Learn About Tidepooling

What is Tidepooling?

Tidepooling is the recreational activity of exploring rocky intertidal zones during low tide. When the ocean recedes, it leaves behind shallow pools filled with marine life - sea stars, anemones, crabs, sea urchins, and much more.

The best tidepooling happens during very low tides, typically below 1 foot. These "negative tides" expose areas that are normally underwater, revealing the richest diversity of creatures.

How Tides Work

Tides are caused by the gravitational pull of the moon and sun on Earth's oceans. Most coastal areas experience two high tides and two low tides each day.

Key concepts:

• Tide height is measured in feet relative to Mean Lower Low Water (MLLW)
• Negative tides (below 0 ft) expose the most marine life
• Spring tides occur during full and new moons, producing the most extreme highs and lows
• Neap tides occur during quarter moons, with less dramatic tidal swings

Tidepooling Etiquette

Tide pools are fragile ecosystems. Following these guidelines helps protect them for future generations:

• Look, don't take. Leave all creatures and shells where you find them
• Watch your step. Walk on bare rock, not on organisms. Mussels and barnacles are living creatures!
• Keep pools clean. Don't add anything to tide pools - no sunscreen-covered hands, no food, no trash
• Respect closures. Some areas are marine protected areas (MPAs) with additional restrictions

What to Bring

• Sturdy footwear - Water shoes or old sneakers with good grip. Rocks are slippery!
• Sun protection - Hat, sunglasses, reef-safe sunscreen
• Layers - Coastal mornings can be cool, especially in winter
• Water and snacks - Low tides are often early morning, before breakfast
• Camera - Document what you see without disturbing it
• Field guide - Optional, but helps identify species

Safety Tips

• Never turn your back on the ocean. Rogue waves can sweep you off rocks
• Check tide times carefully. Make sure you have time to explore before the tide comes back in
• Watch for slippery surfaces. Wet rocks and algae are extremely slippery
• Be aware of weather. Storms can create dangerous conditions
• Go with a buddy. Especially at remote locations