Dominica
Portsmouth cruise weather by month
What to expect when your ship is in Portsmouth in any month: temperatures, how often it rains, wind, sea temperature and wave heights.
- 88°Fwarmest average high (September)
- 81°Fcoolest average high (February)
- 59%fewest rain days (May)
- 89%most rain days (July)
Weather in Portsmouth right now
Weather in Portsmouth by month
Average highs run from 81°F (27°C) in February to 88°F (31°C) in September. Rain falls on the fewest days in May and the most in July. Sea temperature and wave heights are for the water just off the port.
| Month | High / low | Rain days | Wind | Sea temp | Typical seas |
|---|---|---|---|---|---|
| January | 81 / 74°F27 / 24°C | 72% | 15 mph24 km/h | 82°F28°C | 3 ft (0.9 m)Slight; rougher days up to 4 ft |
| February | 81 / 73°F27 / 23°C | 73% | 15 mph24 km/h | 81°F27°C | 3 ft (0.9 m)Slight; rougher days up to 4 ft |
| March | 82 / 74°F28 / 23°C | 63% | 14 mph23 km/h | 81°F27°C | 3 ft (0.8 m)Slight; rougher days up to 4 ft |
| April | 83 / 75°F29 / 24°C | 65% | 13 mph22 km/h | 82°F28°C | 3 ft (0.8 m)Slight; rougher days up to 3 ft |
| May | 85 / 78°F30 / 25°C | 59% | 14 mph23 km/h | 83°F29°C | 2 ft (0.7 m)Slight; rougher days up to 3 ft |
| June | 86 / 78°F30 / 26°C | 70% | 16 mph26 km/h | 84°F29°C | 3 ft (0.8 m)Slight; rougher days up to 4 ft |
| July | 85 / 78°F29 / 25°C | 89% | 16 mph25 km/h | 84°F29°C | 3 ft (0.8 m)Slight; rougher days up to 3 ft |
| August | 86 / 78°F30 / 26°C | 74% | 13 mph22 km/h | 85°F30°C | 2 ft (0.7 m)Slight; rougher days up to 3 ft |
| September | 88 / 79°F31 / 26°C | 71% | 11 mph18 km/h | 86°F30°C | 2 ft (0.6 m)Slight; rougher days up to 3 ft |
| October | 87 / 78°F30 / 26°C | 64% | 12 mph20 km/h | 86°F30°C | 2 ft (0.6 m)Slight; rougher days up to 3 ft |
| November | 85 / 77°F29 / 25°C | 79% | 14 mph22 km/h | 85°F29°C | 3 ft (0.8 m)Slight; rougher days up to 3 ft |
| December | 82 / 75°F28 / 24°C | 66% | 13 mph21 km/h | 83°F28°C | 3 ft (0.9 m)Slight; rougher days up to 4 ft |
Check the forecast for your sailing
Upcoming cruises in Portsmouth
3 ships from 2 cruise lines are scheduled here, 6 visits in total. The next 6:
| Date | Ship | Stop | Sailing |
|---|---|---|---|
| Mon, Nov 302026 | Royal ClipperStar Clippers | Calls | 7 nights from St. John's |
| Mon, Dec 72026 | Royal ClipperStar Clippers | Calls | 7 nights from Bridgetown |
| Mon, Dec 72026 | Star FlyerStar Clippers | Calls | 7 nights from Philipsburg |
| Fri, Dec 112026 | EuropaHapag Lloyd | Calls | 15 nights from New York City |
| Mon, Dec 212026 | Royal ClipperStar Clippers | Calls | 7 nights from Bridgetown |
| Mon, Dec 212026 | Star FlyerStar Clippers | Calls | 7 nights from Philipsburg |
Ships that visit Portsmouth
Nearby cruise ports
- CabritsDominica
- RoseauDominica
- Les SaintesGuadeloupe
- Basse-TerreGuadeloupe
- Pointe-à-PitreGuadeloupe
- DeshaiesGuadeloupe
Wave heights are significant wave height on the Douglas sea state scale. What the numbers mean for a cruise. Sources and method are on the about page.