
Surf Forecasts:
Castlepoint - The Gap surf forecast from 11 Sep 2026:
- Best quality surf: Saturday 12 Sep, 6PM (local time) - 11ft (3.5m), 14s period, S swell with glassy winds.
- Most powerful swell: Saturday 12 Sep, 6PM (local time) - 11ft (3.5m), 14s period, S swell with 4,529 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 6PM (local time) - 11ft (3.5m), 14s 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 (Sep 12) at 6PM. The primary swell is predicted to be 3.5m and 14s period with a secondary swell of 0.4m and 13s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Castlepoint - The Gap in the next 16 days are 3.5m 14s and forecast to arrive on Saturday (Sep 12) at 6PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 5s period and expected on Thursday (Sep 17) at 9PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Sat 12th Sep) | 11ft (3.5m) 14s |
| Best Surf | 6PM (Sat 12th Sep) | 11ft (3.5m) 14s |
| Most Powerful | 6PM (Sat 12th Sep) | 11ft (3.5m) 14s |
Table - best surf conditions forecast for Castlepoint - The Gap over the next 16 days.
The Lowdown
Righto, let’s have a look at what’s on the cards for Castlepoint – The Gap over the next couple of weeks. It’s a bit of a mixed bag, and there’s a fair gap of flatness to sit through before things get properly interesting.
The swell energy is moderate to strong during the first few days, with the combined swell energy hitting up to 996 (moderate) on Saturday morning, but conditions are messy with a cross-on breeze messing things up. Saturday afternoon looks a bit more promising with 10ft S swell at 14 seconds and a strong combined swell energy of 3515, though the wind is cross-shore with a bit of chop.
Sunday morning 13th September is where the first proper window opens up. You’ve got a 7ft S swell (14 seconds) and a light offshore breeze, making it clean. The combined swell energy is 1672, which is moderate to strong. The setup is fairly consistent and the Gap is sheltered, so it holds a bit of size well. The water temperature feels about average for the time of year, nothing too unusual.
Monday morning 14th September has a glassy dawn with 6ft S swell, but the energy drops a bit. Still a fine session if you’re keen on mellow waves.
Then from mid-Tuesday 15th, the surf fades fast. Through to the end of the week and into the next, the swell drops to under 2ft and the combined energy sits below 100 – that’s weak. Thursday 17th, Friday 18th, just tiny barely-surfable dribble with occasional poor wind. That stretch of flatness runs for about 5 days in a row.
The next real standout comes Saturday morning 19th September. A clean 5ft SSW swell (14 seconds) is matched with offshore WNW wind, making for good, clean conditions. Combined swell energy is 1319 – solid moderate. The break is fairly consistent and you might see a few others around as crowds are listed as often, but with that offshore wind and a well-defined S groundswell, it’s a classic morning.
But the true standout of the whole window is Saturday 26th September. You’re looking at a clean 8ft S swell with a 16-second period – very long period groundswell. Combined energy is 3371, which is strong. The wind is offshore and clean. This is for experienced surfers only due to the size, but the Gap is a point-like reef setup and those long-period lines will wrap in beautifully, reforming into proper walls. It’s still a week and a half away, so keep an eye on it, but this one has serious quality written all over it.
To sum it up: Sunday 13th is the first good clean morning, and Saturday 26th September is the big-ticket session that could be absolute magic if the forecast holds.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Sat morning. Very mild (max 12°C on Sun morning, min 8°C on Sat morning). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 16°C on Tue morning, min 9°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||
Wave Height (m) Direction Period (s) | SSW 17 | SSW 16 | S 14 | S 15 | S 14 | SSW 13 | S 12 | S 12 | S 11 | S 10 | S 9 | S 9 | S 9 | S 8 | SSW 13 | SSW 14 | SE 12 | SE 11 | SSW 6 |
Wave Graph | |||||||||||||||||||
399 | 917 | 3472 | 3620 | 1657 | 2318 | 1519 | 926 | 655 | 354 | 129 | 104 | 55 | 34 | 33 | 18 | 37 | 30 | 55 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross | cross-off | cross-off | cross | off | glassy | cross | cross-off | cross-off | cross | cross-off | off | off | off | cross-off | cross-off | off |
High Tide | 5:30AM1.27m | 5:54PM1.34m | 6:25AM1.30m | 6:50PM1.31m | 7:19AM1.32m | 7:45PM1.29m | 8:11AM1.34m | 8:37PM1.28m | 8:59AM1.34m | 9:26PM1.27m | 9:46AM1.32m | 10:12PM1.25m | |||||||
Low Tide | 11:19PM0.07m | 11:43AM-0.01m | 00:17AM0.11m | 12:40PM0.03m | 1:11AM0.14m | 1:36PM0.08m | 2:01AM0.17m | 2:31PM0.13m | 2:50AM0.20m | 3:25PM0.16m | 3:37AM0.22m | 4:14PM0.18m | |||||||
— | 6:22 | — | — | 6:20 | — | — | 6:18 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | |
— | — | 6:00 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:05 | — | — | 6:06 | — | |
mm | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 11 | 8 | 9 | 9 | 12 | 11 | 9 | 12 | 12 | 11 | 16 | 16 | 12 | 15 | 16 | 13 | 15 | 15 | 13 |
Feels °C | 7 | 3 | 5 | 5 | 6 | 5 | 6 | 9 | 8 | 8 | 12 | 12 | 7 | 10 | 11 | 8 | 11 | 11 | 7 |
Swell 1 Height (m) Direction Period (s) | SSW 17 | SSW 16 | S 14 | S 15 | S 14 | S 13 | S 12 | S 12 | S 11 | S 10 | S 9 | S 9 | S 9 | NE 6 | S 8 | NE 6 | SE 12 | SE 11 | SSW 6 |
399 | 917 | 3472 | 3620 | 1657 | 1189 | 1519 | 926 | 655 | 354 | 129 | 104 | 55 | 16 | 21 | 5 | 37 | 30 | 55 | |
Swell 2 Height (m) Direction Period (s) | ESE 7 | ENE 13 | NE 13 | NE 13 | ENE 12 | SSW 19 | NE 12 | NE 12 | NE 11 | NE 13 | SSW 11 | SW 11 | NE 5 | S 8 | NE 6 | SSW 14 | SSW 14 | SSW 13 | NE 5 |
5 | 17 | 43 | 26 | 15 | 125 | 6 | 5 | 5 | 7 | 70 | 31 | 10 | 34 | 8 | 18 | 20 | 18 | 7 | |
Swell 3 Height (m) Direction Period (s) | ENE 14 | ENE 9 | — | — | — | ENE 12 | SE 10 | E 9 | — | E 8 | SE 11 | SSW 15 | SW 11 | SSW 13 | SSW 13 | S 8 | ENE 5 | ENE 5 | ESE 12 |
18 | 8 | — | — | — | 14 | 4 | 2 | — | 1 | 5 | 21 | 31 | 33 | 33 | 5 | 3 | 2 | 15 | |
Wind waves Height (m) Direction Period (s) | — | S 5 | — | — | — | SSW 13 | — | — | — | NE 3 | NNE 3 | NE 3 | NNW 3 | NW 3 | NW 3 | NW 3 | NNW 2 | NW 2 | — |
— | 54 | — | — | — | 2318 | — | — | — | 3 | 1 | 3 | 1 | 2 | 2 | 2 | 1 | 1 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 99 | 1 | 76 | 0 | 99 | 0 | 0 | 55 | 0 | 0 | 28 | 28 | 28 | 4 | 157 | 25 | 4 | 1 |
Best forecast wave conditions in The Wairarapa | |||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.










