Alton Bay Seaplane Base Weather Forecast 15 Days, Weather in B18 Today
Current weather conditions and 15 day weather forecast for Alton Bay Seaplane Base, New Hampshire, USA including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain risk, wind speed, cloud, pressure, and UV index.
Current weather conditions at Alton Bay Seaplane Base
| 14 May 2026 Thursday 7.2 ° C / 45°F  Overcast |
Feels Like : 6.1 ° C / 43°F Humidity : % 97 Pressure : 1011 mb Wind Speed : 6.5 kmph / 4 miles from SE  Visibility : 16 km Precipitation (rainfall) : 0.02 mm Cloud (%) : 100 |
15 day weather forecast for Alton Bay Seaplane Base, NH, USA
Weather Forecast for next 15 Days for Alton Bay Seaplane Base including weather warnings, temperature, rain, wind speed, cloud, snow, wind speed and wind direction, pressure and UV index.Here is weather for the next 15 days in Alton Bay Seaplane Base, New Hampshire state, US. To see the daily forecast, scroll to the table below.
| Date | Weather forecast | Low temperature | High temperature | Avg. temperature | Humidity | Chance of rain | UV Index | Sun Position | Moon Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 14 May 2026 Thursday |  Heavy rain |
6.9 ° C (44.4°F) |
13.4 ° C (56.1°F) |
9.7 ° C (49.5°F) |
% 95 | 92% | 1.9 | Sunrise:05:21 AM Sunset: 08:02 PM |
Moonrise:03:40 AM Moonset: 05:44 PM Moon Phase ( Waning Crescent ) |
|
| 15 May 2026 Friday |  Moderate rain |
7.8 ° C (46°F) |
9.2 ° C (48.5°F) |
8.5 ° C (47.3°F) |
% 98 | 90% | 0.6 | Sunrise:05:20 AM Sunset: 08:03 PM |
Moonrise:04:06 AM Moonset: 07:06 PM Moon Phase ( Waning Crescent ) |
|
| 16 May 2026 Saturday |  Partly Cloudy |
5.9 ° C (42.7°F) |
22 ° C (71.5°F) |
14 ° C (57.3°F) |
% 76 | 0% | 4 | Sunrise:05:19 AM Sunset: 08:04 PM |
Moonrise:04:38 AM Moonset: 08:30 PM Moon Phase ( New Moon ) |
|
| 17 May 2026 Sunday | Partly Cloudy |
11 ° C (51.8°F) |
25.9 ° C (78.7°F) |
17.7 ° C (63.8°F) |
% 74 | 0% | 5 | Sunrise:05:18 AM Sunset: 08:05 PM |
Moonrise:05:21 AM Moonset: 09:52 PM Moon Phase ( Waxing Crescent ) |
|
| 18 May 2026 Monday |  Sunny |
8.5 ° C (47.4°F) |
21.4 ° C (70.6°F) |
13.4 ° C (56.2°F) |
% 75 | 0% | 4 | Sunrise:05:17 AM Sunset: 08:06 PM |
Moonrise:06:16 AM Moonset: 11:01 PM Moon Phase ( Waxing Crescent ) |
|
| 19 May 2026 Tuesday |  Patchy rain nearby |
8.5 ° C (47.3°F) |
28.4 ° C (83.2°F) |
19 ° C (66.2°F) |
% 70 | 72% | 4 | Sunrise:05:16 AM Sunset: 08:07 PM |
Moonrise:07:25 AM Moonset: 11:57 PM Moon Phase ( Waxing Crescent ) |
|
| 20 May 2026 Wednesday | Patchy rain nearby |
12.9 ° C (55.3°F) |
27.1 ° C (80.8°F) |
18.8 ° C (65.9°F) |
% 80 | 74% | 4 | Sunrise:05:15 AM Sunset: 08:08 PM |
Moonrise:08:42 AM Moonset: No moonset Moon Phase ( Waxing Crescent ) |
|
| 21 May 2026 Thursday | Sunny |
7.9 ° C (46.3°F) |
21.2 ° C (70.1°F) |
13.6 ° C (56.5°F) |
% 56 | 0% | 4 | Sunrise:05:14 AM Sunset: 08:09 PM |
Moonrise:10:02 AM Moonset: 12:38 AM Moon Phase ( Waxing Crescent ) |
|
| 22 May 2026 Friday | Sunny |
7.1 ° C (44.8°F) |
18.4 ° C (65.2°F) |
12.4 ° C (54.3°F) |
% 63 | 0% | 4 | Sunrise:05:13 AM Sunset: 08:10 PM |
Moonrise:11:19 AM Moonset: 01:10 AM Moon Phase ( Waxing Crescent ) |
|
| 23 May 2026 Saturday | Partly Cloudy |
2.8 ° C (37°F) |
19.2 ° C (66.5°F) |
11.4 ° C (52.6°F) |
% 63 | 0% | 4 | Sunrise:05:13 AM Sunset: 08:11 PM |
Moonrise:12:32 PM Moonset: 01:35 AM Moon Phase ( First Quarter ) |
|
| 24 May 2026 Sunday | Patchy rain nearby |
9.8 ° C (49.7°F) |
17.9 ° C (64.3°F) |
14 ° C (57.3°F) |
% 72 | 0% | 3 | Sunrise:05:12 AM Sunset: 08:12 PM |
Moonrise:01:42 PM Moonset: 01:55 AM Moon Phase ( Waxing Gibbous ) |
|
| 25 May 2026 Monday | Patchy rain nearby |
8 ° C (46.4°F) |
12.9 ° C (55.2°F) |
9.9 ° C (49.8°F) |
% 81 | 79% | 2 | Sunrise:05:11 AM Sunset: 08:13 PM |
Moonrise:02:48 PM Moonset: 02:14 AM Moon Phase ( Waxing Gibbous ) |
|
| 26 May 2026 Tuesday | Patchy rain nearby |
8.1 ° C (46.6°F) |
12.6 ° C (54.8°F) |
10.8 ° C (51.5°F) |
% 100 | 86% | 3 | Sunrise:05:10 AM Sunset: 08:14 PM |
Moonrise:03:54 PM Moonset: 02:32 AM Moon Phase ( Waxing Gibbous ) |
|
| 27 May 2026 Wednesday | Patchy rain nearby |
11.2 ° C (52.2°F) |
17.9 ° C (64.2°F) |
15.9 ° C (60.5°F) |
% 88 | 83% | 4 | Sunrise:05:10 AM Sunset: 08:15 PM |
Moonrise:04:59 PM Moonset: 02:51 AM Moon Phase ( Waxing Gibbous ) |
|
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