Portsmouth Harbor Weather

43°5'N 70°45'W

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Current Conditions
Overcast
57°F
Feels like: 57°F
Wind Chill: 57°F Ceiling: 200ft
Heat Index: 57°F Visibility: 2mi
Dew Point: 55°F Wind: 7mph
Humidity: 94% Direction: 100° (E)
Pressure: 30.21" Gusts: -
Reported: 17 minutes 59 seconds ago
October 23, 2017 5:00 pm EST
Location: 42.967N 70.623W or 5 nautical miles SE of search location of 43.03175685184N 70.706634521484W.
Wind Direction: E (90°)
Wind Speed: 10 knots
Wind Gust: 11 knots
Atmospheric Pressure: 30.21 in (1023.0 mb)
Pressure Tendency: -0.06 in (-1.9 mb)
Air Temperature: 56°F (13.6°C)
Dew Point: 56°F (13.6°C)
October 23, 2017 3:45 pm EST
Location: 43.059N 70.83W or 6 nautical miles WNW of search location of 43.03175685184N 70.706634521484W.
Wind Direction: ESE (110°)
Wind Speed: 2 knots
Atmospheric Pressure: 30.27 in (1025.0 mb)
Air Temperature: 59°F (15.0°C)
Dew Point: 57°F (14.1°C)
October 23, 2017 4:04 pm EST
Location: 43.181N 70.428W or 15 nautical miles NE of search location of 43.03175685184N 70.706634521484W.
Wind Direction: ESE (110°)
Wind Speed: 2 knots
Wind Gust: 4 knots
Significant Wave Height: 2 ft
Dominant Wave Period: 11 sec
Atmospheric Pressure: 30.26 in (1024.7 mb)
Air Temperature: 56°F (13.4°C)
Water Temperature: 58°F (14.4°C)
Monday, October 23
7:06am / 5:47pm 10:34am / 8:29pm
Cloudy
60°
56°
Day:
Night: Overcast. Patchy drizzle possible. Low 56F. Winds SSE at 10 to 15 mph.
Tuesday, October 24
7:07am / 5:45pm 11:28am / 9:12pm
AM Showers
67°
62°
Day: Showers in the morning, then cloudy in the afternoon. Thunder possible. High 67F. Winds SSE at 10 to 20 mph. Chance of rain 50%.
Night: Rain showers in the evening will evolve into a more steady rain overnight. Low 62F. Winds SSE at 15 to 25 mph. Chance of rain 90%. Rainfall near a half an inch. Locally heavy rainfall possible.
Wednesday, October 25
7:09am / 5:44pm 12:18pm / 9:59pm
Rain
65°
53°
Cloudy with rain. Highs in the mid 60s and lows in the low 50s.
Thursday, October 26
7:10am / 5:43pm 1:04pm / 10:50pm
PM Showers
61°
45°
Showers possible in the afternoon. Highs in the low 60s and lows in the mid 40s.
Friday, October 27
7:11am / 5:41pm 1:46pm / 11:45pm
Sunny
62°
43°
Mainly sunny. Highs in the low 60s and lows in the low 40s.
Saturday, October 28
7:12am / 5:40pm 2:24pm / 12:01am
Sunny
61°
48°
Sunny. Highs in the low 60s and lows in the upper 40s.
Sunday, October 29
7:14am / 5:38pm 2:59pm / 12:44am
Showers
59°
53°
Showers. Highs in the upper 50s and lows in the low 50s.
Monday, October 30
7:15am / 5:37pm 3:32pm / 1:45am
Rain/Wind
60°
41°
Mainly cloudy with rain, windy. Highs in the low 60s and lows in the low 40s.
Tuesday, October 31
7:16am / 5:36pm 4:02pm / 2:49am
Sunny
59°
40°
Mainly sunny. Highs in the upper 50s and lows in the low 40s.
Wednesday, November 1
7:18am / 5:34pm 4:33pm / 3:56am
Mostly Sunny
59°
44°
More sun than clouds. Highs in the upper 50s and lows in the mid 40s.
Wind Forecast
Day MondayTuesdayWednesday
MPH 7 7 9 11 15 16 16 19 19 16 13 11
SSE
SSE
SSE
SSE
SSE
SSE
SSE
SSE
SSE
SSE
S
S
Radar
Marine Forecast
Synopsis: ANZ100-240900- 259 PM EDT Mon Oct 23 2017 .Synopsis for Stonington ME to Merrimack River MA out to 25 NM... A southerly flow will develop over the next couple of days between departing high pressure and a slow moving cold front approaching from the west. South winds will be the strongest Tuesday night and Wednesday when gales will be possible. The front moves offshore Thursday with high pressure building in for Friday and Saturday. $$
Tonight
SE wind around 10 kt. A chance of drizzle after 1am. Patchy fog after 8pm. Seas 2 to 3 ft.
Tuesday
SSE wind around 15 kt, with gusts as high as 25 kt. Areas of drizzle before 9am, then a chance of showers after 11am. Areas of fog. Seas 3 to 4 ft.
Tuesday Night
SSE wind around 15 kt, with gusts as high as 20 kt. Showers likely, with thunderstorms also possible after 5am. Patchy fog before midnight. Seas 5 to 6 ft.
Wednesday
S wind 10 to 15 kt, with gusts as high as 20 kt. Rain and possibly a thunderstorm. Seas around 5 ft.
Wednesday Night
SSW wind 5 to 10 kt. Showers likely, mainly before midnight. Patchy fog. Seas 4 to 5 ft.
Thursday
SW wind 5 to 10 kt. A chance of showers. Seas around 4 ft.
Thursday Night
W wind 5 to 10 kt. Partly cloudy. Seas around 4 ft.
Friday
Variable winds 5 kt or less. Sunny. Seas around 3 ft.
Friday Night
Variable winds 5 kt or less. Mostly clear. Seas around 3 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.