Castlepoint - The Gap Surf Break

Lat Long: 40.91° S 176.22° E

Castlepoint - The Gap Surf Forecast and Surf Report

Issued: 11 pm 30 Aug 2026 (local time)

Forecast update in  hr  min

Today's Castlepoint - The Gap sea temperature is
12.0°C
0.6° 

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 30 Aug 2026:

  • Best quality surf: Tuesday 1 Sep, 3AM (local time) - 15ft (4.5m), 12s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Tuesday 1 Sep, 3PM (local time) - 16ft (5.0m), 13s period, SSW swell with 8,386 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 1 Sep, 12AM (local time) - 10ft (3.0m), 12s 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 Tuesday (Sep 01) at 12AM. The primary swell is predicted to be 3.0m and 12s period with a secondary swell of 0.3m and 9s. 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 5.0m 13s and forecast to arrive on Tuesday (Sep 01) at 3PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 4s period and expected on Monday (Sep 07) at 6AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Tue 1st Sep)10ft (3.0m) 12s
Best Surf 3AM (Tue 1st Sep)15ft (4.5m) 12s
Most Powerful 3PM (Tue 1st Sep)16ft (5.0m) 13s

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


The Lowdown

Alright, Rusty here, giving you the straight-up on your local surf for the next couple of weeks. It’s a bit of a rollercoaster, so hang tight.

Water temp is about what you’d expect for this time of year, nothing crazy. The whole forecast kicks off with a big gap before the main event. The only real standout is on Tuesday, 1st September.

Monday, 31st August is a total washout. Swell is 6ft from the SSW, period 14 seconds, but the wind is howling at 25 mph from the WNW. It’s offshore, so clean, but the energy is massive at 1537 and it’s a nightmare to get into. Just skip it.

Tuesday, 1st September is the big one. The swell jumps to 15ft in the morning from the SSW, period 11 seconds, with energy at 7955. It’s clean with a moderate offshore breeze. By the afternoon, it’s even bigger at 16ft from the SSW, period 13 seconds, energy hitting 12642. This is powerful, groundswell energy. But here’s the rub: Castlepoint - The Gap is a sheltered spot, and that’s just too much swell. It’s for experts only. The wind goes light and cross-shore in the afternoon, so it’s clean but heavy. Not for the faint of heart.

Wednesday, 2nd September is still solid but dropping. Morning sees 8ft from the S, period 14 seconds, energy 2891, with a moderate offshore. Afternoon is 8ft from the S, 15-second period, energy 2782, with a fresh offshore. Clean but still powerful.

After that, it drops off hard. Thursday, 3rd September is down to 4ft, then 3ft, and the energy is low. From Friday, 4th September through Monday, 7th September, it’s barely a ripple. Swell under 3ft, energy often under 100, just poor.

Tuesday, 8th September offers a little something. The morning has 5ft from the SSW, period 11 seconds, energy 597, and it’s clean with a light breeze. That’s a small, workable window for a beginner-to-intermediate wave. The afternoon turns messy again.

The rest of the second week is a mix of tiny waves and poor conditions. Wednesday, 9th September is ordinary, and Thursday, 10th September is a write-off with strong winds. Friday, 11th September stays tiny but clean. Saturday, 12th September sees another spike to 10ft from the SSW, but it’s cross-onshore and choppy—ugly. Sunday, 13th September returns to 8ft from the S, clean and offshore, so that’s a decent option for the experienced crew. Monday, 14th September and Tuesday, 15th September are back to small, clean, and marginal.

Bottom line: The only true standout is Tuesday, 1st September, but it’s a beast for experts only. For beginners, aim for Tuesday, 8th September morning, or Sunday, 13th September for a cleaner, smaller session. The rest is a waiting game.

Rusty.

Short Range Forecast

Light rain (total 7mm), mostly falling on Mon night. Very mild (max 15°C on Mon morning, min 5°C on Mon night). Winds decreasing (strong winds from the WNW on Mon morning, light winds from the NW by Tue afternoon).

Days 5-7 Weather Summary

Some drizzle, heaviest during Thu night. Very mild (max 17°C on Thu morning, min 10°C on Fri night). Winds decreasing (strong winds from the WNW on Wed night, light winds from the WNW by Sat morning).

Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
1
4
!
!
4
3
3
2
1
0
0
0
0
0
1
1
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.5
S
17
1.9
SSW
14
2.1
SSW
13
3
S
12
4.5
SSW
11
5
SSW
13
3
S
13
2.4
S
14
2.5
S
15
1.9
S
13
1.2
S
12
1
S
12
0.7
S
11
0.5
S
10
0.2
SSW
16
0.4
SSW
8
0.8
SSW
8
0.6
SSW
8
0.7
SSW
10
Wave Graph
Metric surfscale
Energy kJ
149
1512
1408
2958
5020
8386
3082
2147
2753
1264
432
266
112
48
25
28
75
51
80
Wind (km/h)
25
W
40
WNW
40
W
15
W
20
WSW
10
SSW
25
WNW
25
WNW
30
WNW
30
WNW
25
WNW
30
WNW
35
NW
25
NW
30
WNW
15
WNW
15
WNW
20
WNW
25
NNW
Wind State
cross-off
off
off
off
cross-off
cross
off
off
off
off
off
off
cross-off
off
off
off
off
off
cross-off
High Tide
7:12AM1.17m
7:39PM1.22m
8:03AM1.24m
8:33PM1.24m
8:53AM1.31m
9:25PM1.28m
9:42AM1.37m
10:15PM1.30m
10:31AM1.42m
11:03PM1.32m
11:23AM1.45m
11:52PM1.32m
Low Tide
1:16AM0.22m
1:23PM0.17m
2:05AM0.20m
2:21PM0.15m
2:54AM0.17m
3:17PM0.12m
3:42AM0.13m
4:10PM0.07m
4:30AM0.08m
5:01PM0.03m
5:19AM0.03m
5:51PM-0.02m
clear
clear
part cloud
rain showers
part cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
clear
light rain
part cloud
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:41
6:39
6:37
6:37
6:35
6:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:49
5:50
5:51
5:52
5:52
5:53
 mm
7
1
Temp °C
14
15
14
6
10
11
10
15
15
14
17
17
16
17
16
13
15
15
12
Feels °C
5
7
5
1
3
7
4
9
8
8
12
12
11
12
10
7
11
10
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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