# Tidepool Days

> Tidepool Days answers one question for each named beach on the US West Coast: which days have a low tide in daylight. It lists picked days, not a full tide chart.

Each beach page gives the next 30 days of picked days with the predicted low time, its height, a window to be there, and sunrise and sunset.

Heights are in feet above mean lower low water (MLLW). Times are the station's local time.

The tide numbers are NOAA CO-OPS predictions of the astronomical tide; the picking is this site's own work.

## How days are picked

- Take every predicted low for the beach's NOAA station for the year.
- Keep a low only if it falls at least 30 minutes after sunrise and at least 30 minutes before sunset at the beach.
- Grade it by its height against the chart's zero, mean lower low water: low at 0.0 ft or lower, very low at -1.0 ft or lower. Where a park or agency names its own height for a beach, that beach uses it and names the source.
- Keep one day per date: the lowest low that passes.
- Give a window from about one hour before the low to one hour after, cut to daylight. For stations NOAA works out from a reference station, times are estimates and the page says about.
- Name the station on every beach page, with its distance from the beach and whether it sits on the open coast, in a harbor, in a bay or at a river mouth.
- Sunrise and sunset are worked out for each beach's own coordinates with NOAA's solar formula.

## What the pages do not say

- That the water reaches the predicted level. Wind, swell and air pressure move the real level, so every height here is a prediction.
- Anything about what lives in the pools, whether you may enter or collect, or how to keep yourself out of harm. Each beach page links the agency that manages it.
- That a razor clam dig is open. In Washington, digs happen only on dates the state approves after toxin tests.
- That NOAA endorses this site.
- These are predictions of the astronomical tide. Wind, swell and air pressure move the real water level, and a big swell can cover a low that looks good here.
- Tide predictions come from NOAA CO-OPS and are in the public domain. NOAA does not endorse this site.

## Beaches in California

- [Enderts Beach, Redwood National and State Parks](https://tidepooldays.com/california/enderts-beach-tide-pools/): Del Norte County; NOAA station CRESCENT CITY (9419750), 6.2 km (3.9 mi) away. Markdown copy: https://tidepooldays.com/california/enderts-beach-tide-pools.md
- [Trinidad State Beach](https://tidepooldays.com/california/trinidad-state-beach-low-tide/): Humboldt County; NOAA station Trinidad Harbor (9419059), 1.0 km (0.6 mi) away. Markdown copy: https://tidepooldays.com/california/trinidad-state-beach-low-tide.md
- [Laguna Point, MacKerricher State Park](https://tidepooldays.com/california/laguna-point-tide-pools/): Mendocino County; NOAA station NOYO HARBOR (9417426), 7.1 km (4.4 mi) away. Markdown copy: https://tidepooldays.com/california/laguna-point-tide-pools.md
- [Shell Beach, Sonoma Coast](https://tidepooldays.com/california/shell-beach-tide-pools/): Sonoma County; NOAA station Green Cove (9416409), 3.6 km (2.2 mi) away. Markdown copy: https://tidepooldays.com/california/shell-beach-tide-pools.md
- [Gerstle Cove, Salt Point](https://tidepooldays.com/california/gerstle-cove-tide-pools/): Sonoma County; NOAA station Fort Ross (9416024), 9.1 km (5.7 mi) away. Markdown copy: https://tidepooldays.com/california/gerstle-cove-tide-pools.md
- [Agate Beach and Duxbury Reef, Bolinas](https://tidepooldays.com/california/duxbury-reef-tide-pools/): Marin County; NOAA station Bolinas Lagoon (9414958), 3.1 km (1.9 mi) away. Markdown copy: https://tidepooldays.com/california/duxbury-reef-tide-pools.md
- [Fitzgerald Marine Reserve, Moss Beach](https://tidepooldays.com/california/fitzgerald-marine-reserve-tide-pools/): San Mateo County; NOAA station Pillar Point Harbor, Half Moon Bay (9414131), 3.0 km (1.9 mi) away. Markdown copy: https://tidepooldays.com/california/fitzgerald-marine-reserve-tide-pools.md
- [Bean Hollow State Beach](https://tidepooldays.com/california/bean-hollow-tide-pools/): San Mateo County; NOAA station Ano Nuevo Island (9413878), 15.8 km (9.8 mi) away. Markdown copy: https://tidepooldays.com/california/bean-hollow-tide-pools.md
- [Natural Bridges State Beach](https://tidepooldays.com/california/natural-bridges-tide-pools/): Santa Cruz County; NOAA station Santa Cruz, Monterey Bay (9413745), 3.7 km (2.3 mi) away. Markdown copy: https://tidepooldays.com/california/natural-bridges-tide-pools.md
- [Pacific Grove Marine Gardens, Point Pinos](https://tidepooldays.com/california/pacific-grove-marine-gardens-tide-pools/): Monterey County; NOAA station MONTEREY, MONTEREY BAY (9413450), 4.5 km (2.8 mi) away. Markdown copy: https://tidepooldays.com/california/pacific-grove-marine-gardens-tide-pools.md
- [Asilomar State Beach](https://tidepooldays.com/california/asilomar-tide-pools/): Monterey County; NOAA station MONTEREY, MONTEREY BAY (9413450), 4.6 km (2.9 mi) away. Markdown copy: https://tidepooldays.com/california/asilomar-tide-pools.md
- [Weston Beach, Point Lobos](https://tidepooldays.com/california/weston-beach-tide-pools/): Monterey County; NOAA station Carmel Cove, Carmel Bay (9413375), 0.9 km (0.6 mi) away. Markdown copy: https://tidepooldays.com/california/weston-beach-tide-pools.md
- [Corallina Cove, Montaña de Oro](https://tidepooldays.com/california/corallina-cove-tide-pools/): San Luis Obispo County; NOAA station PORT SAN LUIS (9412110), 17.3 km (10.7 mi) away. Markdown copy: https://tidepooldays.com/california/corallina-cove-tide-pools.md
- [Carpinteria State Beach](https://tidepooldays.com/california/carpinteria-tide-pools/): Santa Barbara County; NOAA station Rincon Island, Mussel Shoals (9411270), 8.6 km (5.3 mi) away. Markdown copy: https://tidepooldays.com/california/carpinteria-tide-pools.md
- [Leo Carrillo State Beach](https://tidepooldays.com/california/leo-carrillo-tide-pools/): Los Angeles County; NOAA station Mugu Lagoon (ocean pier) (TWC0445), 16.0 km (9.9 mi) away. Markdown copy: https://tidepooldays.com/california/leo-carrillo-tide-pools.md
- [Abalone Cove Shoreline Park](https://tidepooldays.com/california/abalone-cove-tide-pools/): Los Angeles County; NOAA station LOS ANGELES (Outer Harbor) (9410660), 10.4 km (6.5 mi) away. Markdown copy: https://tidepooldays.com/california/abalone-cove-tide-pools.md
- [Point Fermin, San Pedro](https://tidepooldays.com/california/point-fermin-tide-pools/): Los Angeles County; NOAA station LOS ANGELES (Outer Harbor) (9410660), 2.5 km (1.6 mi) away. Markdown copy: https://tidepooldays.com/california/point-fermin-tide-pools.md
- [Little Corona del Mar Beach](https://tidepooldays.com/california/little-corona-tide-pools/): Orange County; NOAA station Newport Bay Entrance, Corona del Mar (9410580), 2.0 km (1.2 mi) away. Markdown copy: https://tidepooldays.com/california/little-corona-tide-pools.md
- [Crystal Cove State Park](https://tidepooldays.com/california/crystal-cove-tide-pools/): Orange County; NOAA station Newport Bay Entrance, Corona del Mar (9410580), 7.9 km (4.9 mi) away. Markdown copy: https://tidepooldays.com/california/crystal-cove-tide-pools.md
- [Treasure Island, Laguna Beach](https://tidepooldays.com/california/treasure-island-tide-pools/): Orange County; NOAA station Newport Bay Entrance, Corona del Mar (9410580), 15.2 km (9.4 mi) away. Markdown copy: https://tidepooldays.com/california/treasure-island-tide-pools.md
- [Doheny State Beach](https://tidepooldays.com/california/doheny-tide-pools/): Orange County; NOAA station San Clemente (TWC0419), 7.4 km (4.6 mi) away. Markdown copy: https://tidepooldays.com/california/doheny-tide-pools.md
- [La Jolla Cove](https://tidepooldays.com/california/la-jolla-tide-pools/): San Diego County; NOAA station La Jolla (Scripps Institution Wharf) (9410230), 2.4 km (1.5 mi) away. Markdown copy: https://tidepooldays.com/california/la-jolla-tide-pools.md
- [Sunset Cliffs Natural Park](https://tidepooldays.com/california/sunset-cliffs-tide-pools/): San Diego County; NOAA station Point Loma (TWC0405), 6.0 km (3.7 mi) away. Markdown copy: https://tidepooldays.com/california/sunset-cliffs-tide-pools.md
- [Cabrillo National Monument tide pools](https://tidepooldays.com/california/cabrillo-tide-pools/): San Diego County; NOAA station Point Loma (TWC0405), 0.9 km (0.6 mi) away. Markdown copy: https://tidepooldays.com/california/cabrillo-tide-pools.md

## Beaches in Oregon

- [Oceanside Beach](https://tidepooldays.com/oregon/oceanside-tide-pools/): Tillamook County; NOAA station Netarts, Netarts Bay (9437262), 4.0 km (2.5 mi) away. Markdown copy: https://tidepooldays.com/oregon/oceanside-tide-pools.md
- [Devils Punchbowl, Otter Rock](https://tidepooldays.com/oregon/devils-punchbowl-tide-pools/): Lincoln County; NOAA station Depoe Bay (9435827), 7.0 km (4.3 mi) away. Markdown copy: https://tidepooldays.com/oregon/devils-punchbowl-tide-pools.md
- [Yaquina Head, Cobble Beach](https://tidepooldays.com/oregon/yaquina-head-tide-pools/): Lincoln County; NOAA station Southbeach (9435380), 6.1 km (3.8 mi) away. Markdown copy: https://tidepooldays.com/oregon/yaquina-head-tide-pools.md
- [Seal Rock](https://tidepooldays.com/oregon/seal-rock-tide-pools/): Lincoln County; NOAA station Waldport, Alsea Bay (9434939), 7.2 km (4.5 mi) away. Markdown copy: https://tidepooldays.com/oregon/seal-rock-tide-pools.md
- [Cape Perpetua Marine Garden](https://tidepooldays.com/oregon/cape-perpetua-tide-pools/): Lincoln County; NOAA station Waldport, Alsea Bay (9434939), 17.7 km (11.0 mi) away. Markdown copy: https://tidepooldays.com/oregon/cape-perpetua-tide-pools.md
- [Sunset Bay State Park](https://tidepooldays.com/oregon/sunset-bay-tide-pools/): Coos County; NOAA station CHARLESTON (9432780), 4.1 km (2.5 mi) away. Markdown copy: https://tidepooldays.com/oregon/sunset-bay-tide-pools.md
- [Harris Beach State Park](https://tidepooldays.com/oregon/harris-beach-tide-pools/): Curry County; NOAA station Brookings, Chetco Cove (9430104), 3.3 km (2.1 mi) away. Markdown copy: https://tidepooldays.com/oregon/harris-beach-tide-pools.md

## Beaches in Washington

- [Salt Creek Recreation Area (Tongue Point)](https://tidepooldays.com/washington/salt-creek-tide-pools/): Clallam County; NOAA station Crescent Bay (9443826), 1.9 km (1.2 mi) away. Markdown copy: https://tidepooldays.com/washington/salt-creek-tide-pools.md
- [Rialto Beach](https://tidepooldays.com/washington/rialto-beach-tide-pools/): Clallam County; NOAA station La Push, Quillayute River (9442396), 1.8 km (1.1 mi) away. Markdown copy: https://tidepooldays.com/washington/rialto-beach-tide-pools.md
- [Second Beach, La Push](https://tidepooldays.com/washington/second-beach-tide-pools/): Clallam County; NOAA station La Push, Quillayute River (9442396), 3.4 km (2.1 mi) away. Markdown copy: https://tidepooldays.com/washington/second-beach-tide-pools.md
- [Constellation Park, Seattle](https://tidepooldays.com/washington/constellation-park-tide-pools/): King County; NOAA station SEATTLE (Madison St.), Elliott Bay (9447130), 6.6 km (4.1 mi) away. Markdown copy: https://tidepooldays.com/washington/constellation-park-tide-pools.md
- [Mocrocks](https://tidepooldays.com/washington/mocrocks-razor-clams/): Grays Harbor County; NOAA station Point Grenville (9441627), 8.4 km (5.2 mi) away. Markdown copy: https://tidepooldays.com/washington/mocrocks-razor-clams.md
- [Copalis](https://tidepooldays.com/washington/copalis-razor-clams/): Grays Harbor County; NOAA station Point Grenville (9441627), 18.8 km (11.7 mi) away. Markdown copy: https://tidepooldays.com/washington/copalis-razor-clams.md
- [Twin Harbors](https://tidepooldays.com/washington/twin-harbors-razor-clams/): Grays Harbor County; NOAA station Westport, Point Chehalis (9441102), 5.6 km (3.5 mi) away. Markdown copy: https://tidepooldays.com/washington/twin-harbors-razor-clams.md
- [Long Beach](https://tidepooldays.com/washington/long-beach-razor-clams/): Pacific County; NOAA station Cape Disappointment (9440581), 8.0 km (5.0 mi) away. Markdown copy: https://tidepooldays.com/washington/long-beach-razor-clams.md

## Other pages

- [Lowest daylight tides of 2027: West Coast tide pool days](https://tidepooldays.com/lowest-tides-2027/): The deepest predicted lows of 2027 that fall between sunrise and sunset, coast by coast, across 39 beaches in California, Oregon and Washington.
- [2027 low tide calendar for one beach: PDF and .ics file](https://tidepooldays.com/calendar/): Every daylight low tide of 2027 at the beach you choose, as a printable PDF and a phone calendar file, $7 paid once.
- [How Tidepool Days picks a low tide day](https://tidepooldays.com/how-days-are-picked/): The rules behind every picked day: 30 minutes of daylight on each side, heights against MLLW, a two-hour window and a named NOAA station.
- [Tide words: minus tide, MLLW, spring, neap and king tides](https://tidepooldays.com/words/): Short meanings of the tide words on these pages: minus tide, mean lower low water, spring and neap tides, king tide, intertidal zone and slack water.
- [Notes on low tides and tide pooling](https://tidepooldays.com/notes/): Articles from Tidepool Days on reading tide predictions, low tide seasons and the beaches on this site.
- [Tide pool day data: JSON files from Tidepool Days](https://tidepooldays.com/data/): Download the beach records and the next 30 days of picked daylight low tides as JSON, worked out from NOAA CO-OPS predictions.

## Data files

- [/data/spots.json](https://tidepooldays.com/data/spots.json): every beach with its stable id, name, coordinates and NOAA station
- [/data/days/tpd-wa-salt-creek.json](https://tidepooldays.com/data/days/tpd-wa-salt-creek.json): one file per beach, named by its stable id, with its picked days for the next 30 days only
- [/llms-full.txt](https://tidepooldays.com/llms-full.txt): every beach with its station, its next 10 picked days, its picked days per month in 2027 and its best months
- [/sitemap.xml](https://tidepooldays.com/sitemap.xml): the sitemap index, with English and Spanish addresses paired

## Markdown copies

Every page has a Markdown copy at its own address with .md in place of the closing slash. The front page's copy is /index.md and the Spanish front page's copy is /es.md.