Castlepoint - The Gap Surf Break

Lat Long: 40.91° S 176.22° E

Castlepoint - The Gap Surf Forecast and Surf Report

Issued: 5 am 26 Aug 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 26 Aug 2026:

  • Best quality surf: Tuesday 1 Sep, 6AM (local time) - 18ft (5.5m), 13s period, S swell with cross-shore winds.
  • Most powerful swell: Tuesday 1 Sep, 9AM (local time) - 23ft (7.0m), 15s period, SSW swell with 21,545 kJ wave energy.
  • Next surfable swell (1★+): Saturday 29 Aug, 3AM (local time) - 2.5ft (0.8m), 11s 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 Saturday (Aug 29) at 3AM. The primary swell is predicted to be 0.8m and 11s period with a secondary swell of 0.9m and 7s. 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 7.0m 15s and forecast to arrive on Tuesday (Sep 01) at 9AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Sunday (Aug 30) at 3PM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Sat 29th Aug)2.5ft (0.8m) 11s
Best Surf 6AM (Tue 1st Sep)18ft (5.5m) 13s
Most Powerful 9AM (Tue 1st Sep)23ft (7.0m) 15s

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


The Lowdown

G’day, Rusty here, and I’ve got a look at the next 16 days for Castlepoint - The Gap. It’s a mixed bag, with a real standout day that’s gonna have the crew frothing, but plenty of ordinary spells in between.

Right off the bat, there’s a gap with no real surf to speak of for the first few days. Wednesday the 26th and Thursday the 27th are poor, so don’t bother paddling out yet. The swell’s there but the wind’s messy or the conditions are just off. Friday the 28th is still nothing to write home about. Saturday the 29th is surfable but very ordinary – small 3 ft south swells with a moderate offshore, but it’s just not doing much.

Then we hit a real dead zone from Sunday the 30th right through to Monday the 31st morning. The swell drops to tiny 1.0-1 ft, and the wind is cross-on or light and onshore. Just skip it.

Now, Monday afternoon the 31st, things start to turn. We’ve got 7 ft south swell, period 14 seconds, and a light WNW offshore wind. The energy is moderate, and the setup is clean. That’s your first real chance for a session, but it’s not the best of the run.

The big one, the absolute standout, is Tuesday the 1st of September morning. This is a monster. The swell is 23 ft from the SSW, period 15 seconds – that’s a very long period groundswell. The wind is light WSW, almost cross-off, and the energy is massively strong. But listen, this is *too big* for The Gap. The break is sheltered and this size will be overwhelming. It’s for experts only, and even then, it’s a serious call. The afternoon drops to 13 ft but the wind swings cross-on, so it’s messy. Still, for the brave, Tuesday morning is the one.

After that, the rest of the first week is a write-off. Wednesday the 2nd has strong offshore winds that make paddling out a mission, and the swell is dropping. Thursday the 3rd to Friday the 4th are small and ordinary. Saturday the 5th and Sunday the 6th are even smaller, with poor conditions. The water temperature is about 53°, which is a touch cooler than normal for this time of year, so you’ll want a good wetsuit.

Second week starts to look a bit more interesting. Monday the 7th is still poor, but Tuesday the 8th of September morning is another standout. We’ve got 7 ft swell from the south, period 16 seconds – that’s a very long period groundswell. The wind is moderate NW offshore, and the energy is strong. This is excellent surf for experienced surfers, but with that long period, it’ll be breaking straight at a beach break. The Gap is a sheltered spot, so it might actually handle it. The afternoon is also solid with 6 ft and clean conditions. That’s your second best bet, and it’s more accessible than the Tuesday monster.

Wednesday the 9th and Thursday the 10th are ordinary again, with the swell dropping and the wind turning cross or onshore. The run ends on a dud.

So, to sum it up: the best on offer is Tuesday the 1st of September morning (23 ft, very long period, but only for the brave), and the more sensible standout is Tuesday the 8th of September morning (7 ft, clean, offshore winds). Keep an eye on the forecasts, but for now, that’s the pick.

Rusty.

Short Range Forecast

Light rain (total 3mm), mostly falling on Wed night. Very mild (max 16°C on Fri morning, min 9°C on Wed night). Winds decreasing (fresh winds from the WNW on Wed morning, light winds from the E by Thu morning).

Days 4-6 Weather Summary

Mostly dry. Very mild (max 14°C on Sat morning, min 8°C on Mon night). Mainly strong winds.

Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
1
3
1
1
1
0
0
1
1
0
0
0
1
2
3
0
!
4
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1
SSW
16
0.9
SSW
15
1.1
SSW
17
1.8
S
17
2
S
16
1.8
S
14
1.4
S
13
1.2
S
12
1
S
11
0.9
S
11
0.9
S
11
0.6
S
11
0.4
SSE
10
0.3
SSE
10
3.5
SSW
9
2.3
S
10
2.2
S
14
1.9
SSW
13
7
SSW
15
4
S
14
2.2
SSW
13
Wave Graph
Metric surfscale
Energy kJ
554
376
737
1909
1953
1261
613
413
248
202
195
83
33
19
1689
1163
1922
1175
21545
6871
1521
Wind (km/h)
35
WNW
30
WNW
30
W
15
SE
20
NE
20
NNE
15
N
30
NNW
30
NW
25
NW
25
NW
30
NW
20
W
5
SE
40
WNW
10
S
10
WNW
40
SSW
10
WSW
10
NE
30
NW
Wind State
off
off
off
on
cross-on
cross
cross-off
cross-off
cross-off
off
off
off
off
cross-on
off
cross-on
off
cross
cross-off
cross-on
off
High Tide
3:24PM1.20m
3:54AM1.07m
4:09PM1.18m
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
Low Tide
9:06AM0.23m
9:45PM0.23m
9:53AM0.22m
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
part cloud
part cloud
rain showers
light rain
cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
part cloud
clear
cloud
part cloud
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:48
6:48
6:46
6:45
6:43
6:41
6:39
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:44
5:45
5:45
5:46
5:47
5:49
5:50
 mm
2
1
Temp °C
15
15
15
9
10
11
16
16
14
14
14
12
13
11
13
11
14
12
10
12
12
Feels °C
11
10
8
6
5
8
12
9
9
7
9
4
8
8
6
9
11
7
7
8
2
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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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