Castlepoint - The Gap Surf Break

Lat Long: 40.91° S 176.22° E

Castlepoint - The Gap Surf Forecast and Surf Report

Issued: 11 am 30 Aug 2026 (local time)

Forecast update in  hr  min

Today's Castlepoint - The Gap sea temperature is
11.9°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, 6AM (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), 12s period, SSW swell with 6,925 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 1 Sep, 6AM (local time) - 15ft (4.5m), 12s period with SSW 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 6AM. The primary swell is predicted to be 4.5m and 12s period with a secondary swell of 3.0m and 12s. Another secondary swell of 0.2m and 9s 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 5.0m 12s and forecast to arrive on Tuesday (Sep 01) at 3PM. 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 Friday (Sep 04) at 12PM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Tue 1st Sep)15ft (4.5m) 12s
Best Surf 6AM (Tue 1st Sep)15ft (4.5m) 12s
Most Powerful 3PM (Tue 1st Sep)16ft (5.0m) 12s

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


The Lowdown

G’day, I’m Rusty, and here’s the outlook for Castlepoint - The Gap in imperial. The surf pattern starts Sunday the 30th, but it’s a slow kick-off. The first few days are mediocre, then it gets massive midweek before tapering off. The best window is the morning of Wednesday the 2nd of September for experienced surfers, and further out, the morning of Sunday the 13th of September also has potential, though it’s a longer-range call.

Sunday the 30th is small and clean but weak. The morning has a 1ft swell from the SSW at 11 seconds, with a WNW wind at 25 km/h blowing straight offshore. The combined energy is low (103), and the water temp is 12°, pretty normal for this time of year. It’s surfable, just nothing special. The afternoon lifts to 2ft but still ordinary.

Monday the 31st picks up to 6ft in the morning from the SSW at 14 seconds, with a strong 40 km/h offshore wind from the WNW. Energy hits 1453 – moderate – but the wind makes paddling tough. The afternoon sits at 7ft with moderate offshore wind but still marginal.

Tuesday the 1st of September blows up – too big. The morning is 15ft from the SSW at 12 seconds, with a cross-offshore wind from the WSW at 20 km/h. Energy is strong at 8054, and the break is sheltered, so it’s dangerous for anyone but experts. The afternoon is even bigger at 16ft (10537 energy) – a spectacle, not a session.

Wednesday the 2nd of September morning is the real highlight. The swell drops to 8ft from the south at a long 15 seconds, with a moderate offshore wind from the WNW at 25 km/h. Energy is still strong at 3988, but it’s clean and the direction works. This is ace for experienced surfers – the long period means powerful lines at this point break. Beginners, stay out. The afternoon gets messy with wind up to 40 km/h.

Thursday the 3rd and Friday the 4th go small again (4ft down to 3ft) with clean offshore wind but low energy. Saturday the 5th stays tiny.

Mark the 13th of September for the morning – 12ft of south swell at 10 seconds, with a gentle offshore wind from the NW at 15 km/h. Energy is strong (2232) and clean for experienced surfers. That’s the long-range one to watch, but it’s nine days out. The afternoon on the 13th is blown out by a strong cross-shore wind, so it’s a one-shot morning.

Between the 6th and the 12th, it’s mostly small or messy, with the 11th of September morning offering a 5ft NE swell in clean offshore wind for a few fun waves. The 14th has size (8ft) but cross-shore, not great.

So, if you’re experienced, the morning of Wednesday the 2nd of September is your pick. The morning of Sunday the 13th of September is the promising long-shot. Otherwise, it’s quiet or too big. The Gap is fairly consistent, so this quiet patch is just temporary.

Rusty.

Short Range Forecast

Moderate rain (total 10mm), heaviest on Mon night. Very mild (max 16°C on Sun morning, min 5°C on Mon night). Winds decreasing (strong winds from the WNW on Mon morning, calm by Tue afternoon).

Days 4-6 Weather Summary

Mostly dry. Very mild (max 17°C on Thu morning, min 11°C on Fri night). Winds decreasing (strong winds from the WNW on Wed afternoon, light winds from the WNW by Fri afternoon).

Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
0
1
2
4
!
!
4
4
2
2
1
1
0
0
1
1
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)
0.4
SSW
11
0.7
SSW
12
0.5
S
17
1.9
SSW
14
2
SSW
12
4
SSW
12
4.5
SSW
12
5
SSW
12
3
S
13
2.5
S
15
2.5
S
15
2
S
14
1.3
S
13
1.1
S
12
1
S
11
0.8
SSW
10
0.6
S
10
0.7
SSW
9
0.6
S
9
0.4
SSW
14
0.6
SSW
11
Wave Graph
Metric surfscale
Energy kJ
44
121
147
1428
1108
4489
5067
6925
3035
3464
3062
1462
556
341
253
136
70
82
57
82
93
Wind (km/h)
25
WNW
20
W
20
WSW
40
WNW
35
W
20
SW
20
WSW
15
SW
20
WNW
25
WNW
40
WNW
30
NW
35
WNW
20
WNW
35
WNW
35
WNW
20
W
15
WNW
20
WNW
5
WNW
25
NNW
Wind State
off
off
cross-off
off
off
cross-off
cross-off
cross-off
off
off
off
off
off
off
off
off
off
off
off
off
cross-off
High Tide
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
10:31AM1.42m
11:03PM1.32m
11:23AM1.45m
11:52PM1.32m
Low Tide
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
4:30AM0.08m
5:01PM0.03m
5:19AM0.03m
5:51PM-0.02m
clear
clear
clear
clear
part cloud
rain showers
part cloud
part cloud
clear
clear
part cloud
part cloud
clear
clear
part cloud
part cloud
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:43
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>
5:47
5:49
5:50
5:51
5:52
5:52
5:53
 mm
10
Temp °C
16
16
13
15
14
8
10
11
10
15
14
15
17
17
15
17
16
11
16
16
13
Feels °C
13
11
5
7
6
2
3
6
4
9
5
9
13
13
9
12
11
7
12
13
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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