MyCruiseForecast

Milne Bay, Papua New Guinea

Alotau cruise weather by month

What to expect when your ship is in Alotau in any month: temperatures, how often it rains, wind, sea temperature and wave heights.

Weather in Alotau by month

Average highs run from 84°F (29°C) in July to 89°F (32°C) in December. Rain falls on the fewest days in August and the most in May. 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
January89 / 76°F32 / 25°C79%7 mph11 km/h–under 1 ft (0.1 m)Smooth; rougher days up to 1 ft
February88 / 76°F31 / 24°C79%7 mph12 km/h–1 ft (0.2 m)Smooth; rougher days up to 1 ft
March89 / 76°F32 / 25°C66%7 mph12 km/h–under 1 ft (0.1 m)Smooth; rougher days up to 1 ft
April87 / 75°F31 / 24°C81%7 mph11 km/h–under 1 ft (0.1 m)Smooth; rougher days up to 1 ft
May85 / 75°F29 / 24°C85%7 mph11 km/h–1 ft (0.3 m)Smooth; rougher days up to 2 ft
June84 / 74°F29 / 23°C71%7 mph11 km/h–1 ft (0.3 m)Smooth; rougher days up to 2 ft
July84 / 73°F29 / 23°C69%7 mph12 km/h–1 ft (0.4 m)Smooth; rougher days up to 2 ft
August84 / 72°F29 / 22°C59%8 mph13 km/h–1 ft (0.4 m)Smooth; rougher days up to 2 ft
September85 / 73°F30 / 23°C78%8 mph13 km/h–1 ft (0.4 m)Smooth; rougher days up to 2 ft
October87 / 74°F30 / 23°C72%7 mph12 km/h–1 ft (0.3 m)Smooth; rougher days up to 1 ft
November88 / 75°F31 / 24°C75%7 mph12 km/h–1 ft (0.2 m)Smooth; rougher days up to 1 ft
December89 / 76°F32 / 24°C77%7 mph11 km/h–under 1 ft (0.1 m)Smooth; rougher days up to 1 ft

Check the forecast for your sailing

Upcoming cruises in Alotau

1 ship from 1 cruise line is scheduled here, 1 visit in total. The next 1:

DateShipStopSailing
Sat, Nov 212026NoordamHolland America LineCalls35 nights from Sydney (New South Wales, Australia)

Ships that visit Alotau

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.