Cool
Average highs are around 14°C, so pack for cooler days.
Weather Guide
Chatham Islands, New Zealand Average Monthly Weather
Weather score35Poor annual avg
Best months: January, February, December
Across the year, average daytime temperatures are around 17°C, sunshine averages 0h per day, and rainfall totals about 824mm. Sea temperatures average 13°C across the year.
Annual weather
Annual averages
Temp
17°C
Rain
824mm
Annual total
Sun
0h
Sea
13°C
Weather score
35
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 67mm, which is relatively low for holiday planning.
Limited sun
Sunshine averages 0h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 11°C, so the water can feel cool.
Map
Weather map
Compare Chatham Islands, New Zealand with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
August14°C average high
August has some of the coolest average daytime highs of the year, so pack for fresher conditions.
Warmest monthsJanuary to March
This stretch sets the upper range for average daytime heat.
Rain
August67mm average rain
August sits on the drier side of Chatham Islands' year, which helps with sightseeing and transfers.
Driest monthsJanuary to May and July to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
August0 hours average sun
August is close to Chatham Islands' usual sunshine level, with limited seasonal swing across the year.
Brightest monthsAll year
Sunshine stays consistently strong through the year.
Sea temperature
August11°C average sea
August is one of the coolest sea months, so the water may feel fresher than in peak months.
Warmest seaJanuary to April
Sea temperatures are usually near 15°C in this stretch, so swimming comfort is at its strongest.
Weather score
August23 weather score
August is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJanuary to February and December
These months have the strongest weather score in the monthly averages.