TenkikaiWx
Weather: Marianas & Micronesia
Free · Designed for iPad. Not verified for macOS.
TenkikaiWx brings official U.S. National Weather Service forecasts and tropical hazard information for the Western Pacific into one clean, fast app, built for the Marianas, Palau, the Federated States of Micronesia, and the Republic of the Marshall Islands.
Whether you are tracking an approaching typhoon or just planning your day on the water, TenkikaiWx puts the sources that matter side by side.
FORECASTS
• Zone and coastal waters forecasts direct from NWS Guam
• Plain-language Area Forecast Discussion so you can read the forecaster's own reasoning
• Coverage for Guam, Saipan, Rota, Tinian, Koror, Yap, Chuuk, Pohnpei, Kosrae, and Majuro
HAZARDS & ALERTS
• Live NWS Watches, Warnings, and Advisories
• Optional push notifications for your chosen region, including time-sensitive alerts that break through Focus and Do Not Disturb modes
• Guam Homeland Security / Office of Civil Defense bulletins in an easy to read and accessible format
SATELLITE & RADAR
• Himawari satellite imagery in both GeoColor and IR, courtesy of RAMMB/CIRA
• WSR-88D NEXRAD Doppler Radar (PGUA) reflectivity, with short-fuse hazard polygon overlays for visual intepretation
MARINE & SKY
• NOAA tide predictions and currents
• Sun and moon rise/set and astronomy
Weather data is provided by the U.S. National Weather Service (NOAA), CIRA at Colorado State University, and Guam Homeland Security (GHS). TenkikaiWx is an independent app and is not affiliated with or endorsed by these agencies. Please continue to heed official forecasts from NWS Guam at weather.gov/gum. For official GHS bulletins, you can access them at ghs.guam.gov.
Ratings & Reviews
Tropical Outlook is now live with JTWC and NWS Guam TC products. New Tropical Weather Discussion section. Community weather reports now alert you when new reports come in, and the map opens on your home island. Radar and satellite loops show frame-loading progress. Various fixes.
The developer, Edwin Montvila, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- User Content
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Edwin Montvila
- Size
- 9.9 MB
- Category
- Weather
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Tenkikai Weather Company