Castlepoint - The Gap Surf Break

Lat Long: 40.91° S 176.22° E

Castlepoint - The Gap Surf Forecast and Surf Report

Issued: 11 pm 28 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 28 Aug 2026:

  • Best quality surf: Tuesday 1 Sep, 12PM (local time) - 15ft (4.5m), 12s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Tuesday 1 Sep, 12PM (local time) - 15ft (4.5m), 12s period, SSW swell with 5,986 kJ wave energy.
  • Next surfable swell (1★+): Saturday 29 Aug, 6PM (local time) - 3ft (0.9m), 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 6PM. The primary swell is predicted to be 0.9m and 11s period with a secondary swell of 0.5m 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 4.5m 12s and forecast to arrive on Tuesday (Sep 01) at 12PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Monday (Aug 31) at 3AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Sat 29th Aug)3ft (0.9m) 11s
Best Surf12PM (Tue 1st Sep)15ft (4.5m) 12s
Most Powerful12PM (Tue 1st Sep)15ft (4.5m) 12s

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


The Lowdown

G’day, Rusty here, and I’ve got the skinny on what’s comin’ through at Castlepoint - The Gap. It’s a spot that’s pretty well sheltered from the main swell direction, so it takes a bit of a specific angle to fire. The start of this run is a bit of a write-off, with only tiny, ordinary waves and fresh wind blowin’ straight off the land, makin’ it clean but just too small to get excited about. We’ve got a real stretch of nothing worthwhile from Saturday the 29th right through to Sunday the 30th, with nothing over 3 ft and scores that don’t get the heart pumpin’. Then Monday the 31st morning is the big standout – that’s the one you want to circle.

Monday, 31 August – morning session at The Gap. This is it. We’ve got a solid 10 ft swell rollin’ in from the SSW, with a period of 9 seconds, and a light NW breeze blowin’ a clean 6 mi/h offshore. The wave energy is pumping hard – values up there around 2816 – and for an experienced surfer, this is excellent. It’s a big swell, over the 8 ft mark, so leave the foamies at home, this one’s for the crew who know how to handle some size. The wind’s light and offshore, so the face is gonna be glassy and clean. That’s the best on offer, no doubt. The water temp’s sittin’ about average for this time of year, so no nasty surprises on that front.

The afternoon of the same day sees the swell hold at 10 ft, but the wind picks up to a fresh 19 mi/h offshore from the WNW, and the period stretches to 13 seconds – that longer period groundswell means better shape and more energy punchin’ through, but the stronger wind makes paddle-outs a bit more of a wrestle. Still, a decent backup session if the mornin’ slips away.

Tuesday, 1 September is a step down. We’ve got 10-13 ft of SSW swell, but the wind swings to a cross-off from the SW at 19 mi/h, and there’s light rain in the mix. The energy is huge – over 8000 in the afternoon – but the conditions are just marginal. It’s doable for the die-hards, but not the clean, dreamy lines of Monday mornin’.

Wednesday, 2 September keeps the size at 8-10 ft from the S, with the wind offshore from the WNW. The morning’s got a fresh breeze, but the afternoon goes to a moderate breeze and a very long 15-second period groundswell. That long period can make these beach-and-reef set-ups a bit straight and fast, but at The Gap it can still offer up some nice walls for the experienced.

Thursday, 3 September sees the swell drop to 5 ft in the morning, but the wind is a strong 25 mi/h offshore – clean as a whistle but you’ll be workin’ hard to get out. The afternoon looks better, with 4 ft and a moderate offshore wind, and the energy’s moderate – around 436. Could be a fun little session if the tides line up.

From Friday, 4 September through to Saturday, 13 September, it’s mostly a mix of very small surf (1 ft to 7 ft) with strong to gale-force offshore winds or messy cross-shore breezes. There’s a few days where the swell gets a bit of size again, like Sunday the 6th with 7 ft from the SSW, but the strong offshore wind makes it a struggle to paddle into. A couple of days around the 10th show some promise with 5 ft and a light wind, but the conditions are still just ordinary to marginal. The best bet is to keep your eyes on the earlier days and don’t hold your breath for the second week – there’s nothing that jumps out as a proper standout after that Monday the 31st.

Rusty, signing off.

Short Range Forecast

Light rain (total 4mm), mostly falling on Sun night. Very mild (max 16°C on Sun morning, min 7°C on Sun night). Mainly near gales.

Days 5-7 Weather Summary

Light rain (total 7mm), mostly falling on Mon night. Very mild (max 16°C on Thu afternoon, min 5°C on Tue night). Winds decreasing (near gales from the WNW on Mon night, light winds from the NNW by Tue night).

Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
1
1
1
0
4
3
0
2
3
4
3
3
2
0
2
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1
S
11
1
S
11
1
S
11
0.7
S
10
0.4
SSE
10
0.7
SSW
12
0.9
SSW
17
3
SSW
9
3
S
13
1.8
SSW
13
3
SSW
12
4
SSW
12
3
S
12
2.5
S
12
3
S
15
2.3
S
14
1.5
S
13
1.2
S
12
0.9
SSW
12
Wave Graph
Metric surfscale
Energy kJ
253
244
235
106
35
127
419
1549
2518
1058
2274
5078
2281
1850
3728
2157
771
432
224
Wind (km/h)
25
NW
30
NW
30
NW
25
NW
20
NW
20
W
35
W
10
NW
30
WNW
55
WNW
30
SW
30
SW
10
WNW
30
WNW
25
WNW
40
WNW
40
WNW
25
WNW
30
NW
Wind State
cross-off
off
off
off
off
off
cross-off
off
off
off
cross-off
cross-off
off
off
off
off
off
off
off
High Tide
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
9:42AM1.37m
10:15PM1.30m
Low Tide
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
3:42AM0.13m
4:10PM0.07m
part cloud
part cloud
part cloud
clear
clear
part cloud
rain showers
part cloud
clear
rain showers
light rain
part cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:45
6:43
6:41
6:39
6:37
6:37
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:46
5:47
5:49
5:50
5:51
5:52
 mm
4
4
3
Temp °C
15
14
14
12
16
16
13
13
14
13
8
9
7
13
13
13
15
16
15
Feels °C
9
7
8
6
12
12
4
8
7
1
0
1
3
6
7
7
7
12
9
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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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