09.15
tue
tue
DAY
62°F
W 7 mph
precip
7%
7%
NIGHT
56°F
NE 8 mph
precip
18%
18%
09.16
wed
wed
DAY
72°F
N 7 mph
precip
13%
13%
NIGHT
70°F
E 5 mph
precip
23%
23%
09.17
thu
thu
DAY
66°F
SW 6 mph
precip
24%
24%
NIGHT
62°F
NE 4 mph
precip
42%
42%
09.18
fri
fri
DAY
76°F
SE 12 mph
precip
3%
3%
NIGHT
54°F
S 14 mph
precip
4%
4%
09.19
sat
sat
DAY
58°F
NW 6 mph
precip
11%
11%
NIGHT
54°F
NE 10 mph
precip
12%
12%
09.20
sun
sun
DAY
58°F
W 11 mph
precip
82%
82%
NIGHT
54°F
S 12 mph
precip
32%
32%
09.21
mon
mon
DAY
60°F
SW 11 mph
precip
11%
11%
NIGHT
54°F
SW 4 mph
precip
9%
9%
09.22
tue
tue
DAY
58°F
W 9 mph
precip
16%
16%
NIGHT
54°F
NW 6 mph
precip
51%
51%
09.23
wed
wed
DAY
60°F
NW 12 mph
precip
80%
80%
NIGHT
60°F
SE 5 mph
precip
71%
71%
09.24
thu
thu
DAY
62°F
W 6 mph
precip
28%
28%
NIGHT
62°F
E 12 mph
precip
38%
38%
09.25
fri
fri
DAY
62°F
E 17 mph
precip
9%
9%
NIGHT
54°F
E 22 mph
precip
14%
14%
09.26
sat
sat
DAY
60°F
SE 11 mph
precip
1%
1%
NIGHT
52°F
SE 6 mph
precip
3%
3%
09.27
sun
sun
DAY
66°F
NE 3 mph
precip
1%
1%
NIGHT
60°F
NE 5 mph
precip
13%
13%
09.28
mon
mon
DAY
74°F
NE 4 mph
precip
5%
5%
NIGHT
68°F
NE 6 mph
precip
17%
17%
Sea water
temperature
temperature
| Portsmouth |
Weather in
September
September
| Portsmouth |
7 day weather
forecast
forecast
| Portsmouth |
10 day weather
forecast
forecast
| Portsmouth |
14 day weather
forecast
forecast
| Portsmouth |
Monthly weather
averages
averages
| Portsmouth |
Current Weather
Conditions
Conditions
| Portsmouth |
When is the Best
Time to Visit?
Time to Visit?
| Portsmouth |
Portsmouth Sea Water Temperature in September, °F
The average sea surface temperature in September 2026 for Portsmouth was 67.5°F. The maximum and minimum values were 64.2°F and 69.2°F respectively.
Portsmouth on the Weather Map
USA Resorts:
NAME
F°
| Boston |  |
+64 |
| Chicago |  |
+66 |
| Hawaii |  |
+80 |
| Las Vegas | |
+80 |
| Los Angeles | |
+74 |
| Maui |  |
+66 |
| Miami |  |
+92 |
| Myrtle Beach |  |
+86 |
| New York | |
+72 |
| Panama City Beach | |
+90 |
| San Diego | |
+72 |
| San Francisco | |
+60 |
| Santa Monica | |
+72 |
| Sarasota | |
+94 |
| Washington | |
+76 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Portsmouth
Local time: 10:34
15 sep, tuesday
| 1200 | |
62°F | W 7 mph |
| 1500 | |
62°F | NW 8 mph |
| 1800 | |
60°F | NW 9 mph |
| 2100 | |
58°F | N 10 mph |
16 sep, wednesday
| 0000 | |
56°F | NE 8 mph |
| 0300 | |
54°F | NE 9 mph |
| 0600 | |
56°F | NE 9 mph |
| 0900 | |
60°F | NE 9 mph |