Castlepoint - The Gap Surf Break

Lat Long: 40.91° S 176.22° E

Castlepoint - The Gap Surf Forecast and Surf Report

Issued: 5 am 04 Sep 2026 (local time)

Forecast update in  hr  min

Today's Castlepoint - The Gap sea temperature is
11.8°C
0.9° 

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 4 Sep 2026:

  • Best quality surf: Monday 7 Sep, 6PM (local time) - 6ft (1.9m), 8s period, SSE swell with glassy winds.
  • Most powerful swell: Wednesday 9 Sep, 12AM (local time) - 6.5ft (2.0m), 8s period, S swell with 509 kJ wave energy.
  • Next surfable swell (1★+): Saturday 5 Sep, 3PM (local time) - 2ft (0.6m), 10s 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 Saturday (Sep 05) at 3PM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.3m and 14s. 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 2.0m 8s and forecast to arrive on Wednesday (Sep 09) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Tuesday (Sep 08) at 9AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Sat 5th Sep)2ft (0.6m) 10s
Best Surf 6PM (Mon 7th Sep)6ft (1.9m) 8s
Most Powerful12AM (Wed 9th Sep)6.5ft (2.0m) 8s

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


The Lowdown

Alright folks, Rusty here. We’ve only got one spot on the radar for this stretch, so let’s dig into what’s coming our way.

The next 16 days are a bit of a mixed bag at Castlepoint - The Gap. There’s a long, slow start with nothing really worth paddling out for in the first week.

We kick off Friday the 4th with a tiny 2ft S swell, but that 30 km/h NNW wind is just messing it up. The energy is weak (106), and it’s a no-go. Saturday and Sunday the 5th and 6th are the same story – small, weak swells, though the wind is offshore. The problem is the size; it’s just not enough to get excited about. Sunday the 6th actually sees a jump in period to 17 seconds, giving us a solid 236 energy reading, but it’s still only 2ft. That long period at a beach break can make things break a bit too straight, so it’s not a standout.

Monday the 7th is a write-off, with rain and onshore winds. Tuesday the 8th though, we get a bit of a pulse: 6ft from the SE with a 9-second period and a solid 629 energy. The wind is a clean cross-off, but the report calls it marginal. That’s a lot of energy for a sheltered spot, and it might be a bit too much for beginners. Wednesday the 9th is the first real glimmer of hope – glassy conditions with a 3ft ESE swell. The wind is dead calm, which is a massive positive for clean conditions, but the swell is small and the period is short (7 seconds). It’s surfable, but not a standout.

The second half of the week into the weekend is a grind. Thursday the 10th has offshore winds and a 3ft SSW swell, but it’s just ordinary. Friday the 11th is a mess with strong onshore winds and a 7ft swell that’s just lumpy and cross-chop.

Now, here’s where it gets interesting. The standout window is from Saturday the 12th through Sunday the 13th. Saturday morning the 12th, we’re looking at 7ft from the S, 11-second period, with a clean offshore wind from the WNW. The energy is very strong (1256). This is the pick of the bunch – solid, clean, and powerful. The afternoon holds 8ft SSW, but it’s marked as marginal. Saturday morning is the best bet.

Sunday the 13th is a big day but for experts only. The morning is 10ft S (12 seconds) with a cross-off wind and 2715 energy. But the real beast is Sunday afternoon: 11ft SSW, 12-second period, glassy conditions, and a massive 4896 energy reading. This is powerful, clean, and only for experienced surfers. Over 8ft, it’s big, and the long period means it’ll have plenty of punch. The water temp is about average for the time of year, so no surprise there.

After that, the swell drops fast. Monday the 14th is blown out with strong winds, and Tuesday the 15th has a small 4ft S swell, but it’s just ordinary. The energy drops to 326. The rest of the week into the 18th and 19th is small and weak, with no real options.

The absolute standout is Saturday the 12th morning for the best combination of size, clean wind, and energy. For the big-wave crew, Sunday the 13th afternoon is a serious proposition, but it’s not for the faint-hearted.

Rusty, signing off.

Short Range Forecast

Light rain (total 7mm), mostly falling on Sun night. Very mild (max 17°C on Sun afternoon, min 10°C on Fri night). Winds decreasing (fresh winds from the NW on Fri morning, light winds from the WNW by Sat morning).

Days 4-6 Weather Summary

Heavy rain (total 27mm), heaviest during Mon morning. Very mild (max 12°C on Mon afternoon, min 7°C on Tue night). Winds increasing (calm on Mon afternoon, fresh winds from the SW by Tue afternoon).

Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
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
0
0
1
0
1
0
0
0
0
2
0
0
2
1
0
0
0
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)
0.7
S
10
0.5
S
10
0.4
SSW
9
0.5
SSW
8
0.6
SSW
10
0.8
SSW
11
0.4
SSW
17
0.5
SSW
16
0.3
SSW
17
0.3
SSW
16
1.6
SSE
7
1.8
SE
8
1.3
SE
8
1.4
SSW
7
2
S
8
1.4
S
8
1.2
SSE
8
0.8
SSE
7
0.3
SSW
11
0.4
SSW
13
0.3
SSW
22
Wave Graph
Metric surfscale
Energy kJ
96
45
26
39
72
133
101
146
56
48
284
398
201
186
509
227
151
59
25
70
91
Wind (km/h)
30
NNW
35
WNW
30
WNW
15
WNW
25
WNW
30
WNW
25
WNW
20
NW
20
NNW
25
SSE
20
ESE
20
W
25
WSW
30
SW
15
W
5
WSW
15
ENE
25
NNW
25
NW
15
WNW
20
SSE
Wind State
cross-off
off
off
off
off
off
off
cross-off
cross-off
cross-on
on
off
cross-off
cross-off
cross-off
cross-off
cross-on
cross-off
off
off
cross-on
High Tide
10:31AM1.42m
11:03PM1.32m
11:23AM1.45m
11:52PM1.32m
12:17PM1.46m
00:45AM1.30m
1:11PM1.46m
1:41AM1.28m
2:07PM1.45m
2:39AM1.26m
3:03PM1.43m
3:37AM1.26m
4:01PM1.41m
Low Tide
5:01PM0.03m
5:19AM0.03m
5:51PM-0.02m
6:07AM-0.01m
6:40PM-0.05m
6:56AM-0.05m
7:30PM-0.06m
7:48AM-0.07m
8:22PM-0.05m
8:45AM-0.07m
9:18PM-0.01m
9:44AM-0.06m
10:17PM0.03m
part cloud
clear
clear
clear
part cloud
clear
cloud
part cloud
mod rain
heavy rain
heavy rain
light rain
cloud
cloud
part cloud
clear
clear
clear
clear
cloud
heavy rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:35
6:33
6:31
6:30
6:28
6:26
6:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:52
5:53
5:54
5:55
5:57
5:58
5:59
 mm
7
15
11
1
25
Temp °C
15
16
12
15
15
13
15
17
14
11
12
11
11
10
8
11
11
10
14
13
10
Feels °C
10
9
4
11
9
6
8
13
9
6
8
9
5
3
2
8
7
6
9
9
8
  • Map Icons:
  • Break
  • 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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