Cool
Average highs are around 11°C, so pack for cooler days.
May verdict
Stewart Island, New Zealand in May
Weather score12Poor
Poor for holiday weather
Average highs are around 11°C, so pack for cooler days. Sunshine averages 2.3h per day, so this is not one of the brighter months. Rainfall averages 123mm, so some wet days are possible.
May weather
Monthly averages
Temp
11°C
Rain
123mm
Sun
2.3h
Sea
13°C
Weather score
12
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 123mm, so some wet days are possible.
Limited sun
Sunshine averages 2.3h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 13°C, so the water can feel cool.
Map
Weather map
Compare Stewart Island, New Zealand with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
May11°C average high
May is on the cooler side of Stewart Island's year, useful if you prefer less intense daytime heat.
Warmest monthsJanuary to March and December
This stretch sets the upper range for average daytime heat.
Rain
May123mm average rain
May is one of Stewart Island's wettest months, so rain is likely to be a major planning factor.
Driest monthsFebruary to March and June to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
May2.3 hours average sun
May is one of Stewart Island's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsJanuary to February and October to December
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
May13°C average sea
May is close to Stewart Island's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaJanuary to April and December
Sea temperatures are usually near 14°C in this stretch, so swimming comfort is at its strongest.
Weather score
May12 weather score
May 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 March and November to December
These months have the strongest weather score in the monthly averages.