Weather in Greymouth in July

A hard month. July is a hard month in Greymouth, and worth planning around. Highs sit at 11.2 °C and the day is short; this is an indoors-with-excursions month, not an outdoors-all-day one.

July ranks 11 of 12 — near the bottom of Greymouth's year. February is the month that works, and the swing between the two is 33 points, which is a different holiday rather than a slightly better one.

Rain on 16 days, 5 of them heavy. Enough to need a plan B, not enough to need a plan around it. Layers, and a genuinely waterproof outer — at 11.2 °C the difference between a good day and a miserable one is entirely down to what you are wearing.

What the averages hide

Averages flatten a month, and this one hides a few things: the day barely swings — 4.5 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest July day reached 15.1 °C and the coldest night fell to 1 °C, and the wettest single day dropped 52 mm — roughly 35% of the month's rain in one day.

July is moderately variable: 31 mm in the driest year against 310 mm in the wettest, around an average of 150 mm. Roughly two Julys in three land near that average, and the third does something else entirely.

Wind is light at 4.8 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 87%, which at 11.2 °C means damp rather than muggy — the kind of cold that gets into a coat and stays there.

How July sits in the year

Temperatures hold steady either side: 12 °C in June, 11.2 here, 12 in August. Nothing about the timing within the month matters much.

Daylight in July

July sits at the dark end of Greymouth's year — 9.3 hours of daylight against 15.3 at midsummer, gaining 0.7 hours across the month. Sightseeing days are genuinely shorter, and an itinerary built for summer will not fit.

Sea temperature

The sea sits at about 13.8 °C in July — too cold to swim without a wetsuit. The sea peaks at 18.5 °C in February and bottoms out at 13.3 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

July in Greymouth versus nearby

If Greymouth is one option among several, the nearby comparison is worth making. Waikowhai is close enough to be a coin toss — within a degree on temperature, the same number of rain days. Christchurch is close enough to be a coin toss — within a degree on temperature, 3 days less rain.

So: July is a compromise. February is 33 points better and is what Greymouth is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Greymouth

See all twelve months in Greymouth, or where else to go in July.