MyCruiseForecast

England, UK

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.

Weather in Portsmouth by month

Average highs run from 47°F (8°C) in January to 72°F (22°C) in August. Rain falls on the fewest days in July and the most in October. Sea temperature and wave heights are for the water just off the port.

Typical conditions, 2022–2025 climate record (ECMWF). Rain days are days with at least 1 mm of rain or melted snow. These are averages, not a forecast.
MonthHigh / lowRain daysWindSea tempTypical seas
January47 / 38°F8 / 3°C35%16 mph26 km/h46°F8°C3 ft (0.8 m)Slight; rougher days up to 5 ft
February50 / 41°F10 / 5°C41%17 mph27 km/h46°F8°C3 ft (0.8 m)Slight; rougher days up to 5 ft
March52 / 42°F11 / 6°C46%15 mph25 km/h47°F8°C2 ft (0.6 m)Slight; rougher days up to 4 ft
April56 / 44°F13 / 7°C35%15 mph24 km/h52°F11°C2 ft (0.6 m)Slight; rougher days up to 4 ft
May64 / 50°F18 / 10°C36%12 mph20 km/h58°F15°C1 ft (0.4 m)Smooth; rougher days up to 3 ft
June69 / 55°F21 / 13°C33%13 mph22 km/h63°F17°C2 ft (0.5 m)Slight; rougher days up to 3 ft
July72 / 58°F22 / 15°C32%14 mph22 km/h65°F19°C2 ft (0.5 m)Smooth; rougher days up to 3 ft
August72 / 58°F22 / 15°C32%13 mph22 km/h67°F19°C2 ft (0.5 m)Slight; rougher days up to 3 ft
September67 / 55°F19 / 13°C42%14 mph22 km/h65°F18°C2 ft (0.6 m)Slight; rougher days up to 4 ft
October61 / 53°F16 / 11°C53%16 mph25 km/h61°F16°C3 ft (0.8 m)Slight; rougher days up to 5 ft
November53 / 45°F12 / 7°C42%16 mph27 km/h55°F13°C3 ft (0.8 m)Slight; rougher days up to 5 ft
December49 / 42°F10 / 6°C41%17 mph27 km/h49°F10°C3 ft (0.9 m)Slight; rougher days up to 5 ft

Check the forecast for your sailing

Upcoming cruises in Portsmouth

5 ships from 2 cruise lines are scheduled here, 20 visits in total. The next 15:

DateShipStopSailing
Sat, Oct 102026Spirit Of AdventureSaga CruisesDeparts15 nights from Portsmouth (England, UK)
Thu, Oct 152026AmadeaPhoenix ReisenCalls24 nights from Bremerhaven
Sat, Oct 172026Spirit Of DiscoverySaga CruisesDeparts20 nights from Portsmouth (England, UK)
Sun, Oct 252026Spirit Of AdventureSaga CruisesEnds here15 nights from Portsmouth (England, UK)
Sun, Oct 252026Spirit Of AdventureSaga CruisesDeparts25 nights from Portsmouth (England, UK)
Mon, Nov 22026AmeraPhoenix ReisenCalls35 nights from Hamburg
Fri, Nov 62026Spirit Of DiscoverySaga CruisesEnds here20 nights from Portsmouth (England, UK)
Fri, Nov 62026Spirit Of DiscoverySaga CruisesDeparts16 nights from Portsmouth (England, UK)
Thu, Nov 192026Spirit Of AdventureSaga CruisesEnds here25 nights from Portsmouth (England, UK)
Sun, Nov 222026Spirit Of DiscoverySaga CruisesEnds here16 nights from Portsmouth (England, UK)
Sun, Dec 62026Spirit Of DiscoverySaga CruisesDeparts14 nights from Portsmouth (England, UK)
Mon, Dec 72026Spirit Of AdventureSaga CruisesDeparts15 nights from Portsmouth (England, UK)
Sun, Dec 202026Spirit Of DiscoverySaga CruisesEnds here14 nights from Portsmouth (England, UK)
Sun, Dec 202026Spirit Of DiscoverySaga CruisesDeparts17 nights from Portsmouth (England, UK)
Tue, Dec 222026Spirit Of AdventureSaga CruisesEnds here15 nights from Portsmouth (England, UK)

Ships that visit Portsmouth

Nearby cruise ports

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.