Portsmouth Harbor Weather

Hazardous marine condition(s):

Synopsis...A FRONT WILL APPROACH FROM THE WEST THIS AFTERNOON AND WILL SLOWLY PUSH OFFSHORE TONIGHT AND TOMORROW. LOW PRESSURE WILL DEVELOP SOUTH OF NEW ENGLAND FRIDAY NIGHT AND WILL INTENSIFY AS IT MOVES SLOWLY NORTHWARD INTO THE GULF OF MAINE OVER THE WEEKEND. LOW PRESSURE WILL SLOWLY CONTINUE NORTHEAST INTO THE CANADIAN MARITIMES ON MONDAY AS HIGH PRESSURE BUILDS IN FROM THE WEST.

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Today: S wind around 15 kt, with gusts as high as 20 kt. A chance of showers, mainly after 11am. Seas 2 to 3 ft.

Tonight: S wind 10 to 15 kt, with gusts as high as 20 kt. Showers and thunderstorms likely, then showers after 11pm. Areas of fog after 11pm. Seas 3 to 4 ft.

Friday: S wind 10 to 13 kt becoming SSE 12 to 15 kt in the afternoon. Winds could gust as high as 20 kt. Showers. Patchy fog. Seas 3 to 4 ft.

Friday Night: N wind 15 to 20 kt. Rain. Seas 4 to 5 ft.

Saturday: NNE wind around 20 kt. Rain. Seas 6 ft building to 8 ft.

Saturday Night: N wind around 20 kt. Rain. Seas around 8 ft.

Sunday: N wind 15 to 20 kt. Rain likely, mainly before 2pm. Seas 7 ft subsiding to 5 ft.

Sunday Night: NW wind around 10 kt. A chance of rain. Seas 3 to 4 ft.

Memorial Day: NW wind around 10 kt. Mostly sunny. Seas around 2 ft.

*Notices: (1) 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.
(2) 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.

Thursday, May 23		5:12am / 8:08pm 6:34pm / 3:57am
PM Thunderstorms	75° 61°	Day: Areas of patchy fog early. Cloudy skies this morning followed by scattered showers and thunderstorms during the afternoon. High near 75F. Winds SSW at 15 to 25 mph. Chance of rain 50%. Night: Showers and thundershowers early, then overcast overnight with steady rain - a thundershower is possible. Low 61F. Winds S at 10 to 20 mph. Chance of rain 70%. Rainfall near a half an inch. Time Temp Chill Humidity Precip Clouds Visibility Wind Weather 9am 56° 56° 93% 20% 83% 10mi SSW 4 mph 10am 60° 59° 90% 20% 79% 10mi SSW 7 mph 11am 63° 62° 84% 20% 78% 10mi SSW 9 mph 12pm 67° 67° 78% 20% 79% 10mi SSW 11 mph 1pm 71° 71° 76% 30% 80% 10mi SSW 13 mph 2pm 72° 72° 73% 30% 82% 10mi SSW 14 mph 3pm 73° 73° 71% 30% 83% 10mi SSW 15 mph 4pm 73° 73° 71% 40% 84% 10mi S 16 mph 5pm 72° 72° 73% 50% 85% 10mi S 17 mph 6pm 71° 71° 73% 50% 87% 10mi S 16 mph 7pm 70° 70° 76% 50% 88% 10mi S 16 mph 8pm 68° 68° 81% 50% 90% 10mi S 15 mph 9pm 67° 66° 84% 40% 90% 10mi S 15 mph 10pm 65° 64° 90% 40% 90% 10mi S 14 mph 11pm 64° 63° 93% 40% 90% 10mi S 14 mph
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Friday, May 24		5:11am / 8:09pm 7:46pm / 4:42am
Rain/Thunder	62° 47°	Day: Periods of rain. A few rumbles of thunder possible late. High 62F. Winds W at 5 to 10 mph. Chance of rain 70%. Rainfall around a half an inch. Night: Overcast with rain showers at times. Low 47F. Winds N at 10 to 20 mph. Chance of rain 60%. Time Temp Chill Humidity Precip Clouds Visibility Wind Weather 12am 64° 63° 93% 50% 90% 10mi S 12 mph 1am 63° 62° 97% 60% 90% 7mi S 10 mph 2am 62° 61° 97% 70% 90% 7mi S 9 mph 3am 62° 61° 97% 70% 91% 7mi S 8 mph 4am 62° 61° 97% 70% 91% 7mi S 8 mph 5am 62° 61° 93% 70% 91% 7mi S 8 mph 6am 62° 61° 93% 70% 91% 7mi S 8 mph 7am 62° 61° 97% 70% 91% 7mi SSW 8 mph 8am 62° 61° 97% 70% 91% 7mi SSW 8 mph 9am 62° 61° 93% 70% 91% 7mi SSW 8 mph 10am 62° 61° 93% 70% 91% 7mi SW 8 mph 11am 62° 61° 90% 70% 91% 7mi SW 8 mph 12pm 61° 60° 93% 70% 90% 7mi WSW 8 mph 1pm 61° 60° 90% 70% 90% 7mi WSW 8 mph 2pm 61° 60° 87% 70% 90% 7mi W 8 mph 3pm 60° 59° 87% 70% 90% 7mi WNW 8 mph 4pm 58° 56° 86% 70% 91% 7mi NW 9 mph 5pm 57° 55° 83% 70% 91% 7mi NNW 9 mph 6pm 56° 53° 83% 60% 91% 7mi NNW 10 mph 7pm 54° 50° 86% 50% 91% 10mi NNW 12 mph 8pm 53° 49° 90% 40% 91% 10mi NNW 13 mph 9pm 53° 49° 86% 40% 91% 10mi N 13 mph 10pm 52° 48° 89% 50% 90% 10mi N 13 mph 11pm 52° 48° 89% 60% 90% 10mi N 12 mph
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Saturday, May 25		5:10am / 8:10pm 8:54pm / 5:35am
Showers/Wind	53° 45°	Windy with showers at times. Highs in the low 50s and lows in the mid 40s. Time Temp Chill Humidity Precip Clouds Visibility Wind Weather 12am 51° 47° 93% 60% 90% 10mi N 12 mph 1am 51° 47° 89% 60% 90% 10mi N 12 mph 2am 50° 45° 93% 60% 89% 10mi N 13 mph 3am 49° 44° 93% 60% 89% 10mi N 13 mph 4am 49° 44° 89% 60% 88% 10mi N 13 mph 5am 48° 43° 89% 60% 87% 10mi N 13 mph 6am 48° 43° 89% 60% 86% 10mi N 13 mph 7am 49° 44° 86% 70% 84% 10mi N 14 mph 8am 49° 44° 89% 60% 82% 10mi N 14 mph
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Sunday, May 26		5:10am / 8:11pm 9:54pm / 6:36am
Showers	50° 43°	Showers. Highs in the low 50s and lows in the low 40s.
Monday, May 27		5:09am / 8:11pm 10:46pm / 7:44am
Partly Cloudy	62° 45°	Partly cloudy. Highs in the low 60s and lows in the mid 40s.
Tuesday, May 28		5:08am / 8:12pm 11:30pm / 8:55am
Partly Cloudy	69° 48°	Partly cloudy. Highs in the upper 60s and lows in the upper 40s.
Wednesday, May 29		5:08am / 8:13pm 11:59pm / 10:07am
Partly Cloudy	73° 54°	Partly cloudy. Highs in the low 70s and lows in the mid 50s.
Thursday, May 30		5:07am / 8:14pm 12:08am / 11:18am
Mostly Cloudy	77° 58°	Mostly cloudy. Highs in the upper 70s and lows in the upper 50s.
Friday, May 31		5:07am / 8:15pm 12:41am / 12:26pm
Cloudy	78° 59°	Cloudy. Highs in the upper 70s and lows in the upper 50s.
Saturday, June 1		5:06am / 8:16pm 1:11am / 1:32pm
Partly Cloudy	80° 59°	Partly cloudy. Highs in the low 80s and lows in the upper 50s.