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8NM SE Portsmouth NH

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 11:58 am EDT Jun 15, 2026
Forecast Valid: 1pm EDT Jun 15, 2026-6pm EDT Jun 21, 2026

This Afternoon

Variable winds 5 kt or less. Sunny. Seas 1 to 2 ft.

Tonight

NW wind around 10 kt. Mostly clear. Seas around 1 ft.

Tuesday

NW wind 5 to 10 kt becoming S in the afternoon. Sunny. Seas around 1 ft.

Tuesday Night

S wind 7 to 10 kt becoming WSW 5 to 8 kt after midnight. Mostly clear. Seas 1 to 2 ft.

Wednesday

Variable winds less than 5 kt becoming SSE 5 to 10 kt in the afternoon. Mostly sunny. Seas around 1 ft.

Wednesday Night

S wind 5 to 10 kt. Partly cloudy. Seas 1 to 2 ft.

Thursday

SSE wind 10 to 15 kt increasing to 15 to 20 kt. Showers likely, mainly after 2pm. Seas 1 ft building to 3 ft.

Thursday Night

S wind 15 to 20 kt becoming WSW 10 to 15 kt in the evening. Showers likely. Seas 3 to 4 ft.

Juneteenth

WSW wind around 10 kt. Mostly sunny. 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.