Sea Temperature

🌊 Know the water before you swim

Sea Temperature shows the water temperature at more than 35,000 beaches, ocean coasts, lakes and rivers worldwide. Check today's ocean temperature, see the 7-day trend and forecast, and find out in one glance whether it is a good day for swimming, surfing or simply a day at the beach.

Heading to Florida, California, Hawaii, the Gulf Coast or the Great Lakes? Planning a beach vacation in Mexico, the Caribbean or Europe? Search any beach or open the map and get the water temp in seconds, in °F or °C.

🌡️ Water temperature today, yesterday and last week

See the current sea and ocean temperature together with the change since yesterday and a week ago. A 7-day chart shows how the water is trending and where it is heading next. The season guide adds monthly minimum and maximum water temperatures and a 30-day history, so you know the best months to swim at every destination.

🛟 Water Safety Index

Is it safe to swim today? The Water Safety Index rates conditions from 0 to 10 using water temperature, wave height, currents, wind and weather, so you can tell at a glance whether the water is calm, moderate or rough. Always follow local lifeguard warnings and beach flags.

⏰ Best time to swim

Get today's best hours for swimming with hourly conditions, a weekend outlook for Saturday and Sunday, and a beach weather forecast with air temperature, wind, humidity and chance of rain.

🏄 Waves and surf conditions

Check current wave height, swell, wind waves and wave period. Switch between a simple view and an expert view made for surfers, kitesurfers and paddleboarders.

🤿 Activities rated for today

Find out what each spot is good for right now: swimming with kids, snorkeling, diving, SUP, surfing, kitesurfing, fishing and camping, each scored for current conditions.

🏖️ Beaches near you

Discover nearby beaches ranked by distance, with ratings, Blue Flag status and facilities such as parking, lifeguards, restrooms and food. Open any beach to see real photos, its location on the map and directions.

🗺️ Interactive map with 35,000+ locations

Explore beaches, lakes and rivers on a world map with smart clustering. Tap an area to see what it contains, zoom in and open any location to check its water temperature.

⭐ Favorites

Save your beaches and lakes and compare them side by side. See which spot has the warmest water today, how your favorites rank, which one warmed up most this week and the best pick for the weekend.

🔔 Notifications and widgets

Get seasonal swimming tips and water temperature updates in your language, and add home screen widgets to check the water without opening the app.

🌗 Made for every day

Light and dark themes, °F or °C, and 35 languages.

💎 Premium

Sea Temperature is free to download. Optional Premium removes ads and unlocks the full forecast, hourly analysis, the full wave timeline, the weekend planner, full beach details and premium widgets.

Made for swimmers, open water swimmers, surfers, divers, kayakers, anglers, boaters and families planning a beach trip. Download Sea Temperature and know the water before you go.