Castlepoint - The Gap Surf Break

Lat Long: 40.91° S 176.22° E

Castlepoint - The Gap Surf Forecast and Surf Report

Issued: 11 pm 27 Aug 2026 (local time)

Forecast update in  hr  min

Today's Castlepoint - The Gap sea temperature is
12.0°C
0.5° 

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 27 Aug 2026:

  • Best quality surf: Monday 31 Aug, 12PM (local time) - 15ft (4.5m), 12s period, SSW swell with offshore winds.
  • Most powerful swell: Monday 31 Aug, 12PM (local time) - 15ft (4.5m), 12s period, SSW swell with 6,315 kJ wave energy.
  • Next surfable swell (1★+): Friday 28 Aug, 3AM (local time) - 5.5ft (1.7m), 13s 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 Friday (Aug 28) at 3AM. The primary swell is predicted to be 1.7m and 13s period with a secondary swell of 0.1m and 16s. Another secondary swell of 0.8m and 5s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Castlepoint - The Gap in the next 16 days are 4.5m 12s and forecast to arrive on Monday (Aug 31) 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 1.1m 4s period and expected on Thursday (Sep 03) at 12AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Fri 28th Aug)5.5ft (1.7m) 13s
Best Surf12PM (Mon 31st Aug)15ft (4.5m) 12s
Most Powerful12PM (Mon 31st Aug)15ft (4.5m) 12s

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


The Lowdown

Alright, let’s get into it. This is your local surf forecast from me, Rusty.

First up, we’re looking at Castlepoint - The Gap. The water temp is sitting at 54°, which is about average for this time of year, so no surprises there.

Now, the overall pattern. The next couple of days are a bit of a write-off, to be honest. We’ve got some energy rolling in on Thursday afternoon the 27th with a 7ft S swell and a very long 16-second period – that’s a proper groundswell. The combined energy is strong at 2265, but the wind is a messy cross-shore and the forecast flags it as marginal. Not where you want to be on a Thursday. Friday the 28th cleans up with a north wind and clean conditions, but the swell drops to 5ft. Saturday and Sunday (29th-30th) are small and ordinary, with the swell dropping under 3ft.

Now, here’s the standout. Monday morning, the 31st of August. We get a jump in energy with a 6ft, 15-second SSW groundswell and a massive combined energy of 2100. The wind is offshore from the W at 12 mph, and the conditions are described as excellent for experienced surfers. This is the real deal. The swell direction (SSW) is almost bang on the optimum direction for The Gap, which is ESE. A long-period swell like this (15 seconds) will love the point setup here; expect proper waves with plenty of push. It’s not beginner-friendly at 6ft, but for anyone with a bit of experience, Monday morning is the session to aim for.

Monday afternoon gets too big. That 15ft of S swell with a 12-second period is just too much for this break – the forecast flat-out says it’s too big. A huge miss.

Tuesday and Wednesday (1st-2nd September) look a bit mixed. Tuesday morning is clean but marginal with wind and tide issues. Wednesday morning on the 2nd looks promising with a 7ft S swell, 12 seconds, and a moderate offshore from the WNW – that’s a good shot at some solid, clean waves.

After that, the second week gets smaller. Thursday and Friday (3rd-5th) are very ordinary with swell below 3ft and strong offshore winds that will make it hard to paddle into. The swell direction shifts around, but nothing really stands out. There’s a bit of a pulse on Friday the 11th of September – the very end of the forecast – with an 8ft, 15-second SSW swell arriving with a moderate offshore and a combined energy of 3305. That’s one to watch if you’re planning that far ahead, but don’t bank on it yet. The long-range outlook is always a bit less certain.

Overall, the clear standout is Monday morning, the 31st of August. After that, keep an eye on Wednesday morning the 2nd of September for another decent window.

This is Rusty, signing off.

Short Range Forecast

Mostly dry. Very mild (max 17°C on Fri afternoon, min 10°C on Thu night). Winds increasing (light winds from the N on Thu night, fresh winds from the W by Sun afternoon).

Days 5-7 Weather Summary

Moderate rain (total 13mm), heaviest on Sun night. Very mild (max 16°C on Wed afternoon, min 6°C on Sun night). Winds decreasing (strong winds from the WNW on Mon night, light winds from the NNW by Tue night).

Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
2
1
0
0
0
1
0
1
0
5
3
1
3
2
3
3
3
1
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
14
1.4
S
13
1.3
S
12
1
S
11
1
S
11
0.9
S
11
0.7
S
11
0.5
SSW
12
0.7
SSW
12
0.4
SSW
16
4
SSW
12
3
S
12
2.2
SSW
13
3.5
SSW
13
2.5
S
12
2.4
S
12
2
S
12
1.8
S
12
1.7
S
12
Wave Graph
Metric surfscale
Energy kJ
1279
623
485
248
248
191
110
77
119
85
5186
2822
1497
3303
1810
1597
1084
911
814
Wind (km/h)
25
NNE
15
N
20
NNW
30
NW
30
NW
25
NW
20
WNW
25
WNW
25
W
20
SSW
20
WNW
30
WNW
40
W
25
SW
15
WSW
15
NW
15
W
20
WNW
30
WNW
Wind State
cross
cross-off
cross-off
cross-off
off
off
off
off
off
cross
off
off
off
cross-off
cross-off
cross-off
off
off
off
High Tide
4:41AM1.07m
4:57PM1.18m
5:30AM1.08m
5:49PM1.18m
6:21AM1.12m
6:43PM1.19m
7:12AM1.17m
7:39PM1.22m
8:03AM1.24m
8:33PM1.24m
8:53AM1.31m
9:25PM1.28m
Low Tide
10:35PM0.24m
10:43AM0.21m
11:30PM0.24m
11:34AM0.20m
00:25AM0.24m
12:28PM0.19m
1:16AM0.22m
1:23PM0.17m
2:05AM0.20m
2:21PM0.15m
2:54AM0.17m
3:17PM0.12m
part cloud
part cloud
cloud
cloud
part cloud
cloud
part cloud
clear
part cloud
rain showers
clear
clear
rain showers
rain showers
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:46
6:45
6:43
6:41
6:39
6:37
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:45
5:46
5:47
5:49
5:50
5:51
 mm
8
3
2
Temp °C
11
15
17
15
14
13
11
15
16
13
12
13
13
8
8
11
15
16
13
Feels °C
8
11
13
9
7
7
6
10
11
6
5
6
3
2
4
5
11
11
7
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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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