Get real-time sea and lake temperatures worldwide with historical data and custom alerts for various water activities. Compare locations, view seasonal trends, and explore with enhanced map features.






214+ iOS apps curated and reviewed
The best water temperatures apps on iPhone average 4.2★ across 214+ titles — we've ranked them by what real users actually keep on their phones. Updated June 2026.






Get real-time sea and lake temperatures worldwide with historical data and custom alerts for various water activities. Compare locations, view seasonal trends, and explore with enhanced map features.






Get real-time sea, ocean, lake, and river water temperatures worldwide. Plan your beach trips, swimming, or surfing with detailed location data and accurate weather forecasts. Save favorite spots and receive smart notifications for temperature changes.






Access comprehensive NOAA marine weather data, including real-time buoy readings, 5-day forecasts, and historical wave trends. Visualize data with map overlays and receive severe weather alerts. An Apple Watch app is also available.


Get real-time sea and ocean temperatures worldwide to plan your perfect beach day. Access up to a 10-day forecast, water clarity, and salinity data for over 20,000 locations. Save your favorite spots and view temperature history.


Get real-time water temperature data for bays, rivers, and lakes across Slovenia, plus major coastal areas in Croatia. Ideal for planning your next swim or water activity.


Access detailed buoy and ship observation data without weather forecasts or tide information. View current conditions, historical trends, and storm locations on an intuitive map. Monitor your favorite locations with customizable widgets.


This mapping application displays real-time ocean water and surface air temperatures across the United States. Data is sourced directly from NOAA's buoys and weather stations, providing current conditions.


Monitor and record water temperatures directly from your Apple Watch. Get real-time readings, switch between units, and track your session duration. Ideal for water sports enthusiasts and anyone interested in water conditions.


Access worldwide tidal estimates, lunar data, and weather forecasts. Plan outdoor adventures with ease using current radar and offline predictions. Supports Apple Watch and includes a Today Extension for quick access.


Get detailed marine weather forecasts for offshore fishing and boating. Plan your trips with wind, wave, and tide predictions up to 16 days out. Visualize ocean conditions with high-resolution charts and a proprietary wave forecast model for enhanced accuracy.


Monitor Black Sea water temperatures with real-time data. Utilizes automated buoys during summer and satellite imagery in colder months for comprehensive tracking.






Easily convert temperatures between Celsius, Fahrenheit, and Kelvin with a clean and intuitive interface. This utility app offers quick and accurate conversions for everyday use. Ads are present but can be removed via a one-time purchase.


Access real-time marine weather data from over 1,500 NOAA buoys across the USA. Plan your outdoor activities with detailed information on wind, waves, temperature, and more. Offline access to the last known observations is also available.


Get real-time water temperatures for lakes and rivers across Switzerland. Perfect for swimmers, kayakers, and water sports enthusiasts to check conditions before diving in, year-round.


This app helps you maintain regular hydration by calculating your daily water intake needs and sending timely reminders. It offers statistics, motivational awards, and useful tips to encourage healthy fluid consumption. Integration with Apple Watch and Apple Health enhances its functionality.


Access real-time ocean water temperatures, tide information, and detailed wave forecasts. View SST charts, historical wave data, and marine weather forecasts from NOAA and NWS. Save your favorite locations for quick access.


Provides real-time bathing water quality and weather forecasts for subscribed Danish beaches. View beach locations on a map with color-coded flags indicating safety for swimming. Get up to three days of forecast information and mark your favorite locations.


Get real-time water temperature, weather, and flow information for the Aare river. View a temperature forecast for the next two hours and display key data directly on your home screen. Customize your preferred temperature alerts.