Castlepoint - The Gap Surf Break
Lat Long: 40.91° S 176.22° E

Castlepoint - The Gap Sea Temperature and Wetsuit Guide

Weather Forecast for Castlepoint - The Gap

Issued: 11 am 09 Jun 2026 (local time)

Forecast update in  hr  min

Today's Castlepoint - The Gap sea temperature is
13.7° C

Normal for this time of year

Castlepoint - The Gap surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Castlepoint - The Gap sea temperature is 13.7 °C

(Normal for this time of year)

Mean: 13.9 °C
Range: 12.9 °C to 15.1 °C
Statistics for 09 Jun (1981–2005)
  • neoprene wetsuit hood for warmth and a watertight seal in cold sea temperatures
  • neoprene gloves for warmth, grip, and protection in cold temperatures

Today, many surfers would wear a spring wetsuit, a neoprene hood and gloves.

The water temperature (13 °C) at Castlepoint - The Gap is quite cool. You will need a quality spring wetsuit, and maybe neoprene hood because it will be cloudy with an effective air temperature of just (6 °C). Gloves are a good idea, neoprene boots optional.

New Zealand Sea Water Temperature

Map of current New Zealand
Surface Water Temperatures

(based on measurements from oceanographic satellites)
New Zealand Water Temperature Anomaly

Map of current New Zealand
Sea Water Temperature Anomalies

(compared with long term averages
at this time of year)

click thumbnails to expand

Below is a graph of Historical Sea Surface Temperature for Castlepoint - The Gap. This has been derived from analysis of two decades of oceanographic satellite measurements of nearby open water. We have calculated the average water temperature variation around the year as well as the extremes that have been observed on each date.

Castlepoint - The Gap Water Temperature Graph

All of the graphs for the surf breaks presented on Surf-Forecast.com are on the same scale to enable comparison between locations around the world.

Castlepoint - The Gap water temperatures peak in the range 17 to 20°C (63 to 68°F) on around the 8th of February and are at their lowest on about the 27th of August, in the range 12 to 14°C (54 to 57°F). The maximum Castlepoint - The Gap water temperatures in early to mid February require something like a 3/2mm fully sealed wetsuit. The lowest water temperatures at Castlepoint - The Gap in the last days of August are ideally suited to a 4/3mm wetsuit + 3mm boots, although a 5/3mm wetsuit may be preferable for longer sessions and cold windy days.

Actual sea surface water temperatures close to shore at Castlepoint - The Gap can vary by several degrees compared with these open water averages. This is especially true after heavy rain, close to river mouths or after long periods of strong offshore winds. Offshore winds cause colder deep water to replace surface water that has been warmed by the sun. Air temperature, wind-chill and sunshine should also be considered before deciding on the kind of wetsuit needed to stay warm when surfing at Castlepoint - The Gap. Refer to our detailed weather forecasts for this information.

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