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4NM W Sinapalu GU

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 6:06 pm ChST Sep 18, 2026
Forecast Valid: 11pm ChST Sep 18, 2026-6pm ChST Sep 25, 2026

Overnight

WSW wind 6 to 8 kt. Mostly cloudy. Waves around 2 ft.

Saturday

WSW wind 5 to 8 kt. Scattered showers and thunderstorms. Waves around 2 ft.

Saturday Night

Variable winds 5 kt or less. Scattered showers and thunderstorms. Waves around 2 ft.

Sunday

Variable winds 5 kt or less. Scattered showers and thunderstorms. Waves around 2 ft.

Sunday Night

Variable winds 5 kt or less. Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Waves around 2 ft.

Monday

Variable winds less than 5 kt becoming SSE around 6 kt in the afternoon. Partly sunny. Waves around 2 ft.

Monday Night

SSE wind around 6 kt. A chance of showers. Waves around 2 ft.

Tuesday

SE wind 5 to 9 kt. A chance of showers. Waves around 2 ft.

Tuesday Night

SSE wind 6 to 9 kt. A chance of showers. Waves 1 ft or less.

*Notices:

This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.

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