Castlepoint - The Gap Surf Break

Lat Long: 40.91° S 176.22° E

Castlepoint - The Gap Surf Forecast and Surf Report

Issued: 5 am 02 Sep 2026 (local time)

Forecast update in  hr  min

Today's Castlepoint - The Gap sea temperature is
11.9°C
0.7° 

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


Castlepoint - The Gap surf forecast from 1 Sep 2026:

  • Best quality surf: Wednesday 2 Sep, 6PM (local time) - 8ft (2.5m), 14s period, S swell with offshore winds.
  • Most powerful swell: Wednesday 2 Sep, 12PM (local time) - 10ft (3.0m), 16s period, S swell with 4,030 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 2 Sep, 6PM (local time) - 8ft (2.5m), 14s period with S swell.

Best Forecast Surf Conditions for Castlepoint - The Gap this week:

The surf forecast for Castlepoint - The Gap over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Sep 02) at 6PM. The primary swell is predicted to be 2.5m and 14s period with a secondary swell of 0.2m and 11s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Castlepoint - The Gap in the next 16 days are 3.0m 16s and forecast to arrive on Wednesday (Sep 02) at 12PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Wednesday (Sep 02) at 12PM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Wed 2nd Sep)8ft (2.5m) 14s
Best Surf 6PM (Wed 2nd Sep)8ft (2.5m) 14s
Most Powerful12PM (Wed 2nd Sep)10ft (3.0m) 16s

Table - best surf conditions forecast for Castlepoint - The Gap over the next 16 days.


The Lowdown

Alright folks, Rusty here. Let’s have a look at what’s coming our way for the next couple of weeks. We’ve got a lot of data to chew through, but I’ll break it down for you.

The first thing you’ll notice is that the surf window opens up with a bang, but it gets a bit messy after that. The real standout is the start of the period, and then we have to wait a while for the next good pulse.

The opening act is on Wednesday, September 2nd. We’re looking at a solid, powerful swell from the south. The morning has a clean 6 ft south swell, with a very long period of 17 seconds and a massive 3358 combined energy. That’s some serious groundswell pushing in. The wind is a fresh offshore from the WNW at 19 mph, which will keep the faces clean. This is prime for a point break or reef, and this spot is a sheltered spot, so it should handle that size well. By the afternoon, the swell is up to 8 ft from the south with a period of 15 seconds and 3183 combined energy. Still clean with that same offshore breeze. This is expert territory due to the size, but the quality is there. This is the best on offer.

Thursday, September 3rd starts with a strong 25 mph offshore wind from the WNW. There’s a 5 ft south swell, but that wind is blowing a gale. It’s clean, but you’ll be fighting to get out. The afternoon eases off to a 4 ft south swell with a 12 mph offshore breeze, making for a more manageable session.

Then we hit a dry spell. Friday, September 4th, through to the end of the first week, the surf drops right off. The swell heights are tiny, under 2 ft, and the energy is weak. There’s a bit of a spike on Monday, September 7th, with a 7 ft south-southwest swell in the morning, but it’s getting smashed by a 22 mph cross-offshore wind, making it a mess. The afternoon gets even bigger at 12 ft, but the wind turns direct cross-shore, creating a lumpy, choppy mess. Not worth the paddle.

Tuesday, September 8th has a clean 6 ft south swell with a moderate offshore wind, but the forecast calls it marginal. The next real highlight comes on Friday, September 11th. The morning has a 8 ft south swell with a nasty 25 mph offshore wind. It’s clean, but again, a battle to get out. The afternoon is a write-off with strong cross-shore winds.

Hold out for Saturday, September 12th. This is the second standout. A beautiful 6 ft south swell with a 12-second period rolls in. The wind is a light offshore breeze from the WNW at 6 mph in the morning, turning to a gentle 9 mph in the afternoon. This is clean, lined-up, and very surfable. The combined energy is a solid 905. This is the one to circle on the calendar.

Sunday, September 13th is a washout with near-gale force winds. Monday, September 14th is good again. A 8 ft south swell in the morning with a gentle offshore breeze. That’s a big, clean wave, but it’s for experts only. The afternoon is a cleaner 7 ft with a light breeze.

After that, the surf fades again. Tuesday, September 15th and beyond are small, with weak energy and onshore winds. The final days of the forecast period show some clean but small swell from the south-southwest with long periods, but the size is just too small to get excited about.

Water temperature here is 53°, which is about 1° cooler than average for this time of year. Just a touch on the chilly side, so a good wetsuit is a must.

So, to sum it up: Wednesday, September 2nd is the big daddy for the experts, and Saturday, September 12th is the best bet for everyone else. The rest is a mixed bag of wind and small waves.

Stay stoked, and I’ll see you out there.

Rusty

Short Range Forecast

Some drizzle, heaviest during Fri morning. Very mild (max 17°C on Thu afternoon, min 10°C on Fri night). Mainly strong winds.

Days 4-6 Weather Summary

Moderate rain (total 18mm), heaviest on Mon morning. Very mild (max 17°C on Sun afternoon, min 6°C on Mon night). Winds increasing (calm on Sat morning, strong winds from the SSW by Mon morning).

Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
3
3
0
2
0
0
0
0
0
1
1
0
0
0
0
0
3
1
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.8
S
17
2.5
S
15
2.2
S
13
1.5
S
12
1.2
S
12
0.9
S
11
0.6
S
10
0.4
S
10
0.2
SSW
15
0.5
SSW
7
0.6
SSW
9
0.8
SSW
10
0.3
SSW
18
0.6
SSW
16
1.3
NE
6
2.1
SSW
7
3.5
SSW
10
2.4
S
10
1.8
S
10
1.5
S
9
1.9
S
8
Wave Graph
Metric surfscale
Energy kJ
1863
3170
1710
690
396
191
73
29
21
31
62
116
63
206
108
394
2299
1183
575
367
511
Wind (km/h)
30
WNW
30
WNW
20
W
40
WNW
20
NW
25
NW
25
NW
35
WNW
30
W
15
WNW
15
WNW
25
NW
25
NW
20
NNW
30
NW
35
SW
35
SSW
10
WNW
20
NW
20
SSW
10
W
Wind State
off
off
off
off
off
cross-off
cross-off
off
off
off
off
off
cross-off
cross-off
cross-off
cross-off
cross
off
cross-off
cross
cross-off
High Tide
9:25PM1.28m
9:42AM1.37m
10:15PM1.30m
10:31AM1.42m
11:03PM1.32m
11:23AM1.45m
11:52PM1.32m
12:17PM1.46m
00:45AM1.30m
1:11PM1.46m
1:41AM1.28m
2:07PM1.45m
2:39AM1.26m
Low Tide
3:17PM0.12m
3:42AM0.13m
4:10PM0.07m
4:30AM0.08m
5:01PM0.03m
5:19AM0.03m
5:51PM-0.02m
6:07AM-0.01m
6:40PM-0.05m
6:56AM-0.05m
7:30PM-0.06m
7:48AM-0.07m
8:22PM-0.05m
clear
clear
clear
clear
clear
part cloud
rain showers
clear
clear
clear
clear
part cloud
cloud
part cloud
light rain
rain showers
part cloud
part cloud
part cloud
rain showers
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:37
6:37
6:35
6:33
6:31
6:30
6:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:51
5:52
5:52
5:53
5:54
5:55
5:57
 mm
1
2
16
1
Temp °C
15
15
13
16
17
15
16
17
12
15
16
13
15
17
15
10
10
7
12
10
8
Feels °C
9
8
8
10
13
10
11
10
3
13
12
8
10
13
10
1
1
2
9
5
4
  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Castlepoint - The Gap Surf forecast

The above surf forecast table for Castlepoint - The Gap provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Castlepoint - The Gap can be found by selecting the local surf guide option on the grey menu. Our Castlepoint - The Gap surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Castlepoint - The Gap) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Castlepoint - The Gap may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Are you planning a holiday in The Wairarapa? If you are looking for accommodation near Castlepoint - The Gap, camping, hotels and holiday cottages in The Wairarapa, consider staying in Masterton which is 48 km (30 miles) away. Other places in and around The Wairarapa where you can find information about places to rent, and car hire include Palmerston North which is 80 km (50 miles) away and Levin, 86 km (53 miles) away.

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