Surf Forecasts:
Castlepoint - The Gap surf forecast from 23 Aug 2026:
- Best quality surf: Thursday 27 Aug, 9AM (local time) - 7ft (2.1m), 18s period, S swell with cross-offshore winds.
- Most powerful swell: Thursday 27 Aug, 9AM (local time) - 7ft (2.1m), 18s period, S swell with 2,702 kJ wave energy.
- Next surfable swell (1★+): Monday 24 Aug, 9AM (local time) - 5ft (1.6m), 14s 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 Monday (Aug 24) at 9AM. The primary swell is predicted to be 1.6m and 14s period with a secondary swell of 0.3m and 13s. 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 2.1m 18s and forecast to arrive on Thursday (Aug 27) at 9AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Saturday (Aug 29) at 6AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Mon 24th Aug) | 5ft (1.6m) 14s |
| Best Surf | 9AM (Thu 27th Aug) | 7ft (2.1m) 18s |
| Most Powerful | 9AM (Thu 27th Aug) | 7ft (2.1m) 18s |
Table - best surf conditions forecast for Castlepoint - The Gap over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s take a look at what’s coming down the pipe for the next couple of weeks.
We’ve got a slow start, with nothing really worth getting wet for until later in the week. The first few days are just building energy, but the real standout is going to be Thursday the 27th of August, and then a massive pulse way out on Friday the 4th of September that’s only for the brave.
For the early part of the week, Monday the 24th through Wednesday the 26th, the waves are there but not firing. Monday morning at Castlepoint - The Gap sees a clean 5ft SSW swell with a 14-second period and a moderate offshore breeze. The combined energy is moderate (977). It’s surfable but nothing to brag about. The wind picks up in the afternoon, making it messy. Tuesday and Wednesday drop off in size and quality, with smaller swells and stronger winds.
Now, Thursday the 27th of August is the one to circle. We get a solid 7ft S swell rolling in with a very long 18-second period – that’s proper groundswell energy. The combined energy is strong (2469). The morning is absolutely glassy with zero wind. For a sheltered spot like The Gap, that’s a dream. It’s clean, powerful, and well overhead. This one’s for experienced surfers, as it’ll be pushing limits for anyone not comfortable in solid surf. The water temp is about average for this time of year.
Friday the 28th hangs in there with a 5ft S swell and light cross-off winds, still clean and fun but smaller. Saturday and Sunday drop off further into the 3ft to 4ft range with glassy spells, but it’s pretty ordinary – small, slow waves for a longboard or a foiler.
We then hit a bit of a lull through the end of August and into the start of September. The wind turns messy, and the swell drops off. Not much to get excited about from Monday the 31st through to Wednesday the 2nd of September.
But then, Friday the 4th of September – hold onto your board. We’ve got a massive 13ft S swell hitting with an 18-second period. The combined energy is off the charts at (10959). That’s huge, powerful, and only for expert surfers. The morning looks clean with light winds, but the afternoon gets ruined by a strong cross-onshore. If you’re a seasoned charger, get in the water early. This is the big one, but it’s over two weeks away, so keep an eye on the forecasts.
Saturday the 5th of September still has solid 8ft to 7ft S swell with clean winds, offering very good surf for those who can handle it. After that, the swell fades quickly into the following week with small, weak waves.
So, the best on offer: Thursday morning, 27th of August for clean, powerful 7ft groundswell, and Friday morning, 4th of September for the serious, massive 13ft swell. Everything else is small or blown out.
Rusty.
Short Range ForecastMostly dry. Very mild (max 16°C on Wed afternoon, min 10°C on Mon morning). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Fri night. Very mild (max 18°C on Thu afternoon, min 10°C on Sat night). Mainly fresh winds. | ||||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | |||||||||||||||
AM | PM | 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 14 | SSW 13 | SSW 12 | SSW 12 | SSW 15 | SSW 15 | SSW 16 | SSW 15 | SSW 16 | S 18 | S 16 | S 14 | S 13 | S 12 | S 12 | S 11 | S 11 | S 10 | S 10 | S 9 | S 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 926 | 1452 | 567 | 418 | 605 | 385 | 452 | 376 | 669 | 2702 | 2344 | 1126 | 643 | 501 | 396 | 300 | 289 | 177 | 125 | 111 | 68 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | off | off | off | cross-off | off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | off | cross | cross-off |
High Tide | 2:01PM1.24m | 2:24AM1.10m | 2:42PM1.22m | 3:09AM1.08m | 3:24PM1.20m | 3:54AM1.07m | 4:09PM1.18m | 4:41AM1.07m | 4:57PM1.18m | 5:30AM1.08m | 5:49PM1.18m | 6:21AM1.12m | 6:43PM1.19m | ||||||||
Low Tide | 8:20PM0.21m | 8:22AM0.24m | 9:01PM0.22m | 9:06AM0.23m | 9:45PM0.23m | 9:53AM0.22m | 10:35PM0.24m | 10:43AM0.21m | 11:30PM0.24m | 11:34AM0.20m | 00:25AM0.24m | 12:28PM0.19m | 1:16AM0.22m | ||||||||
 | |  | |  | | |  |  | | | | | |  | | |  | | | | |
 | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — |
 | — | 5:42 | — | — | 5:43 | — | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:47 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | 1 | — | — | — |
Temp °C | 14 | 14 | 12 | 15 | 15 | 12 | 15 | 16 | 15 | 16 | 18 | 14 | 15 | 16 | 13 | 15 | 15 | 11 | 15 | 13 | 11 |
Feels °C | 8 | 8 | 6 | 9 | 7 | 6 | 10 | 12 | 9 | 14 | 15 | 11 | 11 | 12 | 9 | 12 | 13 | 9 | 9 | 9 | 9 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 13 | SSW 12 | SSW 12 | SSW 15 | SSW 15 | SSW 16 | SSW 15 | SSW 16 | S 18 | S 16 | S 14 | S 13 | S 12 | S 12 | S 11 | S 11 | S 10 | S 10 | S 9 | S 8 |
| kJ | 926 | 1452 | 567 | 418 | 605 | 385 | 452 | 376 | 669 | 2702 | 2344 | 1126 | 643 | 501 | 396 | 300 | 289 | 177 | 125 | 111 | 68 |
Swell 2 Height (m) Direction Period (s) | ESE 13 | ESE 13 | ESE 14 | ESE 13 | ESE 13 | SSW 19 | ESE 13 | ESE 13 | ESE 12 | ESE 11 | ESE 11 | ESE 11 | ESE 5 | E 5 | SE 14 | ENE 7 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 |
| kJ | 32 | 34 | 36 | 17 | 17 | 115 | 17 | 17 | 15 | 13 | 12 | 12 | 5 | 5 | 29 | 93 | 71 | 33 | 24 | 18 | 17 |
Swell 3 Height (m) Direction Period (s) | ESE 13 | — | SSW 18 | — | NE 5 | ESE 12 | SE 14 | E 10 | E 10 | — | — | — | ESE 5 | SE 15 | SE 13 | SE 13 | SE 13 | SSW 6 | ESE 12 | ESE 12 | SE 12 |
| kJ | 32 | — | 31 | — | 1 | 15 | 8 | 2 | 2 | — | — | — | 5 | 8 | 28 | 28 | 26 | 10 | 15 | 14 | 23 |
Wind waves Height (m) Direction Period (s) | WNW 3 | NW 3 | NW 3 | WNW 2 | W 3 | WNW 3 | WNW 3 | WNW 3 | WNW 3 | — | — | NE 4 | NE 5 | NE 5 | NE 6 | NNW 2 | SW 4 | — | NW 3 | — | — |
| kJ | 4 | 2 | 1 | 1 | 4 | 5 | 5 | 3 | 3 | — | — | 8 | 6 | 10 | 32 | 1 | 6 | — | 3 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 16 | 16 | 16 | 88 | 16 | 16 | 0 | 135 | 0 | 0 | 0 | 0 | 28 | 28 | 0 | 0 | 0 | 16 | 1 | 16 |
Best forecast wave conditions in The Wairarapa | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
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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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