Local guide

Go at low water.

Low tide is when the South Sound shows you what it hides the rest of the day: rocky shore pools full of sea stars and anemones, tide flats you can walk for a quarter mile, and beaches that double in width. The best public tidepooling near Olalla Bay is at Kopachuck State Park, Penrose Point State Park, and Purdy Spit, all within about 25 minutes of the house. The house beach does this too, but it is private and reserved for guests of the house.

Timing is everything. Plan for the lowest low tide of the day, and the whole intertidal zone opens up.

Written by Assaf, the Olalla Bay editor. Updated October 2026.

The lowest low tides of the year are the good ones. Puget Sound runs on mixed tides, two highs and two lows most days, with the two lows at different heights. When the low tide line on the chart goes negative, a minus tide, the water pulls far back off the beach and exposes everything: rock pools, sand flats, and animals that only exist in the intertidal zone.

When to go

Late spring and summer. That is when the minus tides tend to land in the morning, which is the best tidepooling of the year: daylight, calm water, and the whole intertidal zone laid out. In winter the big low tides mostly happen after dark. The whole tide cycle slides about an hour later each day, so check the chart the morning you go, not the week you arrive.

Give yourself a two-hour window centered on the low tide time. You want to arrive before the low, explore the falling water, and be walking back before the turn. Read the full tides guide for how the water moves through the bay.

Which table to check

Use NOAA's tide predictions for Gig Harbor, station 9446369. It is the closest published NOAA station to Olalla Bay, and it is close enough for planning your day at any of the three spots below. Bookmark the page on your phone.

Reading the chart is simple. Look at the low tide lines and their heights. A negative number means a minus tide. Lower is better. The two lows on a given day are rarely equal, so do not just pick a day, pick the right low.

The three best public spots

Kopachuck State Park: the tidepools. The best rocky-shore tidepooling near Olalla. Washington State Parks lists 5,600 feet of saltwater shoreline on Henderson Bay, with a rocky upper beach that levels into a sandbar at low tide. Walk the waterline slowly and look down: sea stars in orange and purple, green anemones closed up like olives, small crabs in the pools. The park reopened in August 2026 after a full renovation, with a new Welcome Center, trails, and playground. It is day-use only and needs a Discover Pass. About 15 minutes from the house.

Purdy Spit: the tide-flat walk. A Pierce County park on the spit at Purdy, between Burley Lagoon and Henderson Bay, and one of the closest public beaches to Olalla. The tide flats walk well at low tide, which is the whole point: come at the low, walk the flats, and watch the bay fill back in behind you. Simple and small. About 10 minutes from the house.

Penrose Point State Park: the most shoreline. A 237-acre marine park on the Key Peninsula with nearly two miles of Puget Sound shoreline on Mayo Cove and Carr Inlet, plus two and a half miles of wooded trails behind the beach. The bay between the point and the small spit to the northwest is the best area to explore at low water. Day-use areas are open year-round; needs a Discover Pass. About 25 minutes from the house.

Know before you go. All three parks are closed to shellfishing for the 2026 season. Harvesting shellfish anywhere in Washington also requires a shellfish/seaweed license and a check of WDFW and Department of Health beach status. This guide is look-only, which needs no license at all.

Tide-pool rules

This part matters. Wet your hands before you touch anything. Step only on bare rock, never on the animals or the algae they live under. Do not pry animals off the rock. Put every rock back exactly where you found it, because the underside of the rock is where the small things live. Do not take shells with animals still in them. The tidepool is someone's whole world, and it has to survive until the water comes back.

Bring water shoes or rubber boots. Sharp shells are common on these beaches, and the rock is slippery. Pack out everything you bring.

One safety note

The tide comes back over the low flats first, which means the path you walked out on can flood before the ground you are standing on does. Keep an eye on the turn, give yourself plenty of time, and never get so absorbed in a tidepool that you forget the water is coming back. On Colvos Passage, check current predictions before paddling across: read the kayaking guide for where to go and when.

Questions people ask

When is the best time for tidepooling near Seattle?

Late spring and summer, when the minus tides tend to land in the morning. Daylight, calm water, and the biggest exposed intertidal zone of the year.

Where do I check tide predictions for Burley Lagoon and Colvos Passage?

NOAA's Gig Harbor station, 9446369. It is the closest published station to Olalla Bay and close enough for planning your day.

Do I need a Discover Pass for Kopachuck or Penrose Point?

Yes. Both are state parks. Buy one in advance online or at the park. Purdy Spit is a county park and does not use the Discover Pass system.

Can I harvest shellfish at Kopachuck or Penrose Point?

Not in the 2026 season: both are closed to shellfishing. Harvesting anywhere in Washington requires a shellfish/seaweed license and a check of beach status. This guide is look-only.

Where is the best tidepooling near the house?

The private beach at a minus tide, for guests of the house. For public water: Kopachuck for tidepools, Purdy Spit for the tide-flat walk, Penrose Point for the most shoreline.