Castlepoint - The Gap Surf Break

Lat Long: 40.91° S 176.22° E

Castlepoint - The Gap Surf Forecast and Surf Report

Issued: 11 am 08 Sep 2026 (local time)

Forecast update in  hr  min

Today's Castlepoint - The Gap sea temperature is
12.4°C
0.3° 

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 8 Sep 2026:

  • Best quality surf: Saturday 12 Sep, 9PM (local time) - 10ft (3.0m), 16s period, S swell with cross-offshore winds.
  • Most powerful swell: Sunday 13 Sep, 12AM (local time) - 10ft (3.0m), 16s period, SSW swell with 4,402 kJ wave energy.
  • Next surfable swell (1★+): Thursday 10 Sep, 6AM (local time) - 3ft (0.9m), 8s period with ESE 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 Thursday (Sep 10) at 6AM. The primary swell is predicted to be 0.9m and 8s period with a secondary swell of 0.3m and 8s. 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 3.0m 16s and forecast to arrive on Sunday (Sep 13) at 12AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Thursday (Sep 10) at 12AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Thu 10th Sep)3ft (0.9m) 8s
Best Surf 9PM (Sat 12th Sep)10ft (3.0m) 16s
Most Powerful12AM (Sun 13th Sep)10ft (3.0m) 16s

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


The Lowdown

G'day, I'm Rusty. Let's look at what we've got coming up at The Gap, Castlepoint.

We've got a bit of a mixed bag on the way over the next couple of weeks, but there are some definite standouts for the crew who can pick their moments. The water temp is sitting at 54.3°F, which is about average for this time of year, so nothing too wild there.

The Tuesday morning (8th September) will kick things off with some waves. We're looking at a 5.2ft swell from the east-southeast, with a period of 8 seconds. The wind is a light westerly-southwesterly at 3.1 mph, making it a nice cross-offshore breeze. The wave energy is moderate at 439, and the conditions are clean. It's a solid, if unspectacular, start.

Wednesday (9th) and most of Thursday (10th) are a bit of a write-off. The wind swings around wrong, and the swell drops away. Thursday morning does see a clean 2.6ft wave with a decent offshore, but it's pretty weak (98 energy) and ordinary.

Now, Friday morning (11th September) is where it starts to get interesting. The swell picks back up to 5.2ft from the south-southwest, but the period is short at 7 seconds, so it'll be a bit of a close-out, racy wave. The wind is a clean offshore westerly at 6.2 mph, and the energy is moderate at 761. It's a decent option, but not a standout.

Saturday afternoon (12th September) gets a bit of a spike with a 5.9ft south swell (15-second period) and a massive energy jump to 1417. The problem is a light cross-onshore easterly wind is messing with the surface. It'll be punchy but a bit bumpy. The scoring suggests questionable tide conditions.

The standout of the whole outlook is Sunday the 13th of September, specifically the morning. We are looking at a solid 8.2ft groundswell from the south-southwest with a long period of 16 seconds. The combined energy is a thumping 3000, meaning there is a heap of power in the water. The wind is a perfect, clean offshore from the west-northwest at 6.2 mph. This is going to be excellent for experienced surfers only. That is big, powerful stuff and will be a real session for the crew who can handle it. The afternoon has a similar sized 6.9ft swell and offshore wind, but the commentary flags it as marginal for tide.

Monday morning (14th) drops back to 3.9ft but stays clean, and Monday afternoon ramps back up to 6.6ft with a cross-offshore breeze. The following Tuesday (15th) and Wednesday (16th) mornings see good offshore winds, though Wednesday's swell is tiny. The wind gets a bit fresh on Tuesday's afternoon.

Moving into the second week, Thursday the 17th of September morning is promising with a clean 4.6ft swell (14-second period) and a light offshore, energy at 842. But the real headline in that second week is Friday the 18th of September. The morning session here has a 7.2ft south swell (13 seconds) with a clean offshore westerly breeze, energy of 1741. The afternoon is nearly as good with a 5.9ft swell and a cross-offshore north breeze. Both are flagged as very good conditions. Saturday morning (19th) is also clean with a 3.9ft long-period swell (16 seconds), but be aware of the big onshore change that's forecast for Saturday afternoon which will blow it out.

The end of the window has a bit of a messy system blowing through, but we get another chance on Wednesday the 23rd of September with a clean 5.6ft south swell and moderate energy (1388). That could be a nice way to wrap things up.

So, for the pick of the crop, make sure you are in the water early on Sunday the 13th morning for the biggest, cleanest groundswell, and if you miss that, keep Friday the 18th morning penciled in. Castlepoint - The Gap is a fairly consistent spot, and crowds are often a factor here, so get in early for the best of it.

Short Range Forecast

Heavy rain (total 20mm), heaviest during Thu afternoon. Very mild (max 13°C on Wed afternoon, min 7°C on Thu night). Winds increasing (light winds from the WSW on Tue morning, fresh winds from the S by Thu night).

Days 4-6 Weather Summary

Mostly dry. Very mild (max 13°C on Sun morning, min 8°C on Fri morning). Wind will be generally light.

Tuesday
8
Wednesday
9
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
1
2
0
0
0
1
1
0
2
1
1
0
3
4
4
4
2
2
2
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.6
ESE
8
1.6
E
9
1.6
E
9
1.4
ESE
8
1.4
ESE
8
1.2
E
8
0.8
ESE
8
0.6
ESE
8
1.9
S
7
0.6
SSW
19
0.6
SSW
18
0.8
S
12
0.9
SSW
16
1.8
S
15
3
SSW
16
2.5
SSW
16
2.1
S
15
1.8
S
14
1.2
SSW
13
2
S
12
1.6
S
12
Wave Graph
Metric surfscale
Energy kJ
333
386
386
277
270
186
79
47
327
284
249
196
348
1392
4402
2979
2016
1243
499
1066
690
Wind (km/h)
5
WSW
10
SE
10
SE
10
NNE
20
NE
25
NNW
20
WNW
15
W
35
S
10
W
15
NW
10
W
20
S
5
E
15
NW
10
WNW
5
ESE
15
S
10
N
25
NW
15
WNW
Wind State
cross-off
cross-on
cross-on
cross
cross-on
cross-off
off
cross-off
cross
off
off
cross-off
cross-on
cross-on
off
off
on
cross
cross-off
cross-off
off
High Tide
2:07PM1.45m
2:39AM1.26m
3:03PM1.43m
3:37AM1.26m
4:01PM1.41m
4:34AM1.26m
4:58PM1.38m
5:30AM1.27m
5:54PM1.34m
6:25AM1.30m
6:50PM1.31m
7:19AM1.32m
7:45PM1.29m
Low Tide
8:22PM-0.05m
8:45AM-0.07m
9:18PM-0.01m
9:44AM-0.06m
10:17PM0.03m
10:44AM-0.04m
11:19PM0.07m
11:43AM-0.01m
00:17AM0.11m
12:40PM0.03m
1:11AM0.14m
1:36PM0.08m
2:01AM0.17m
part cloud
part cloud
cloud
part cloud
part cloud
clear
cloud
mod rain
rain showers
part cloud
part cloud
clear
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:28
6:26
6:24
6:24
6:22
6:20
6:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:57
5:58
5:59
6:00
6:00
6:01
6:02
 mm
10
10
Temp °C
11
11
10
12
13
11
12
12
9
11
12
9
10
10
8
13
13
11
13
15
11
Feels °C
8
7
7
8
8
5
7
9
1
8
8
6
5
7
4
10
11
8
9
10
6
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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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