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18NM S Portland ME

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 1:50 pm EDT Jul 14, 2025
Forecast Valid: 4pm EDT Jul 14, 2025-6pm EDT Jul 21, 2025

Late Afternoon

S wind around 10 kt. Scattered showers and thunderstorms. Seas around 2 ft.

Tonight

S wind 5 to 10 kt. Scattered showers and thunderstorms before 11pm, then isolated showers. Patchy fog after 11pm. Seas around 2 ft.

Tuesday

Variable winds 5 kt or less. Patchy fog before 10am. Seas around 2 ft.

Tuesday Night

Variable winds 5 kt or less. Patchy fog after 4am. Seas around 2 ft.

Wednesday

S wind 5 to 8 kt increasing to 7 to 10 kt in the afternoon. Patchy fog before 9am. Seas around 2 ft.

Wednesday Night

SSW wind around 10 kt. Patchy fog. Seas around 2 ft.

Thursday

S wind around 10 kt. A chance of showers and thunderstorms after 2pm. Patchy fog before 10am. Seas around 2 ft.

Thursday Night

SSW wind around 10 kt becoming WSW after midnight. A chance of showers and thunderstorms before 8pm. Patchy fog. Seas around 2 ft.

Friday

W wind 5 to 10 kt becoming S in the afternoon. A chance of showers. Patchy fog before 10am. Seas around 2 ft.

Winds and seas higher in and near tstms.

*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.