Stewart Island Weather in May

Average temperatures, rainfall, sunshine and the best places to visit in Stewart Island, New Zealand in May.

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Half-moon Bay

Are you planning a trip a to Stewart Island, New Zealand in May and wondering what kind of weather to expect? This page has all the details you need.

What to Expect in Stewart Island in May

Stewart Island, New Zealand is a region in New Zealand. May in Stewart Island generally has mild temperatures, with high precipitation.

Temperatures

You can expect mild maximum daytime temperatures of around 13°C (55°F) and nighttime temperatures around 8°C (46°F) in Half-moon Bay.

To explore the conditions in Stewart Island, New Zealand in more detail, check the map below.

Precipitation

May is a rainy month with an average rainfall of around 114 mm (4.5 in) in Half-moon Bay.

Average sunshine

Sunshine is quite limited in many locations during May. Half-moon Bay receives roughly 88 hours of sunlight. For destinations with more sunshine, our weather planner offers alternatives worldwide.

Explore Stewart Island by month

Pick a month to see the average temperature, rainfall and sunshine in Stewart Island — and find the best time to visit. (based on Half-moon Bay)

January17°C (63°F) February17°C (63°F) March16°C (61°F) April15°C (59°F) May13°C (55°F) June11°C (52°F) This monthJuly10°C (50°F) August11°C (52°F) September12°C (54°F) October13°C (55°F) November15°C (59°F) December16°C (61°F)
Best Time to Visit Stewart Island →

Best Places to Visit in Stewart Island in May

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Stewart Island.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Stewart Island

What is the weather like in May for the most popular destinonation in Stewart Island, New Zealand?

Half-moon Bay

In May Half-moon Bay generally has moderate temperatures with maximum daytime temperatures around 13°C (55°F), minimum nighttime temperatures around 8°C (46°F) and high monthly rainfall. So on average the conditions are poor that month.

« April
May
June »
April
May
June
Max temperature
15°C (59°F)
13°C (55°F)
11°C (52°F)
Min temperature
9°C (48°F)
8°C (46°F)
6°C (43°F)
Monthly sun hours
119 hours
88 hours
77 hours
Monthly rainfall
107 mm (4.2 in)
114 mm (4.5 in)
102 mm (4 in)
Monthly rainy days
23 days
26 days
25 days
Weather conditions
unpleasant
poor
poor
Climate in Half-moon Bay →

Is your destination not in the list? Have a look at all destinations in Stewart Island, in New Zealand.

In our records: New Zealand May extremes

Notable May records observed across cities in New Zealand in our climate database (1976 – 2026). Historic readings can vary in quality, so treat these as illustrative.

  • In our records, the coldest May daytime high in New Zealand was -6°C (21°F) in Franz Josef on May 28, 2013.

Stewart Island weather in May: frequently asked questions

What is the weather like in Stewart Island, New Zealand in May?

Expect poor weather across Stewart Island, New Zealand in May. The popular destination of Half-moon Bay averages 13°C (55°F) by day and 8°C (46°F) at night during this month.

What is the average temperature in Stewart Island, New Zealand in May?

In Half-moon Bay, the average daytime high in May is 13°C (55°F), while nighttime temperatures drop to around 8°C (46°F).

Does Stewart Island, New Zealand get a lot of rain in May?

Half-moon Bay typically receives notable rainfall in May, about 114 mm (4.5 in) on average across Stewart Island, New Zealand.

Is May a Good Time to Visit Stewart Island, New Zealand?

In our view, May might not be the best time to travel to Stewart Island, New Zealand with often poor weather in Half-moon Bay.

On average, the best time to visit Stewart Island, New Zealand is in January, February, March, April, August, November and December with generally unpleasant weather in Half-moon Bay.

Interested in more climate information?

We have much more information about the climate in Stewart Island.

Weather and climate has detailed information for every country in the world. Are you going to New Zealand? Get detailed historical weather averages for many cities in New Zealand.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.

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