Surf Forecasts:
Castlepoint - Slippery surf forecast from 21 Jul 2026:
- Best quality surf: Saturday 25 Jul, 3PM (local time) - 10ft (3.0m), 9s period, SSW swell with cross-shore winds.
- Most powerful swell: Tuesday 28 Jul, 3AM (local time) - 8ft (2.5m), 14s period, ESE swell with 2,655 kJ wave energy.
- Next surfable swell (1★+): Tuesday 21 Jul, 6PM (local time) - 5.5ft (1.7m), 13s period with S swell.
Best Forecast Surf Conditions for Castlepoint - Slippery this week:
The surf forecast for Castlepoint - Slippery over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Jul 21) at 6PM. The primary swell is predicted to be 1.7m and 13s period with a secondary swell of 0.4m and 11s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Castlepoint - Slippery in the next 16 days are 2.5m 14s and forecast to arrive on Tuesday (Jul 28) at 3AM. 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 4s period and expected on Saturday (Jul 25) at 9AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Tue 21st Jul) | 5.5ft (1.7m) 13s |
| Best Surf | 3PM (Sat 25th Jul) | 10ft (3.0m) 9s |
| Most Powerful | 3AM (Tue 28th Jul) | 8ft (2.5m) 14s |
Table - best surf conditions forecast for Castlepoint - Slippery over the next 16 days.
Short Range ForecastMostly dry. Very mild (max 13°C on Thu afternoon, min 6°C on Tue morning). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 18mm), heaviest on Sat afternoon. Very mild (max 15°C on Fri morning, min 6°C on Sat night). Winds increasing (calm on Sat night, fresh winds from the S by Sun night). | ||||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | |||||||||||||||
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) | S 15 | S 14 | S 13 | SSW 12 | S 12 | SSW 12 | SSW 12 | SSW 11 | S 10 | S 9 | NE 6 | ENE 7 | ENE 8 | SSW 9 | S 9 | S 8 | E 12 | E 12 | ESE 13 | ESE 13 | ESE 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1733 | 1207 | 633 | 248 | 344 | 121 | 81 | 51 | 17 | 15 | 25 | 81 | 103 | 1356 | 567 | 239 | 233 | 235 | 1013 | 1778 | 2582 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | off | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | off | cross | cross-off | on | cross-on | cross-on | cross | cross | cross-off |
High Tide | 10:46AM1.36m | 11:13PM1.33m | 11:36AM1.35m | 00:01AM1.29m | 12:26PM1.33m | 00:46AM1.26m | 1:14PM1.32m | 1:32AM1.22m | 1:59PM1.30m | 2:19AM1.18m | 2:41PM1.29m | 3:05AM1.14m | 3:22PM1.26m | ||||||||
Low Tide | 5:08PM0.07m | 5:30AM0.10m | 6:00PM0.13m | 6:15AM0.15m | 6:48PM0.18m | 6:58AM0.21m | 7:34PM0.22m | 7:39AM0.25m | 8:18PM0.25m | 8:21AM0.28m | 9:02PM0.27m | 9:04AM0.29m | 9:46PM0.28m | ||||||||
 |  |  | |  |  | | | | | |  |  | | | | |  | | | | |
 | 7:31 | — | — | 7:31 | — | — | 7:30 | — | — | 7:28 | — | — | 7:28 | — | — | 7:28 | — | — | 7:26 | — | — |
 | — | 5:10 | — | — | 5:10 | — | — | 5:12 | — | — | 5:13 | — | — | 5:14 | — | — | 5:15 | — | — | 5:15 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 3 | 4 | 5 | — | 1 | 3 | 2 | — | — | — |
Temp °C | 9 | 11 | 10 | 11 | 11 | 9 | 12 | 13 | 12 | 15 | 15 | 12 | 10 | 10 | 7 | 8 | 9 | 9 | 9 | 9 | 7 |
Feels °C | 5 | 7 | 6 | 9 | 9 | 7 | 7 | 8 | 7 | 10 | 11 | 8 | 5 | 3 | 2 | 5 | 1 | 0 | 2 | 3 | 2 |
Swell 1 Height (m) Direction Period (s) | S 15 | S 14 | S 13 | SSW 12 | S 12 | SSW 12 | SSW 12 | SSW 11 | NE 4 | NE 6 | S 9 | ENE 7 | ENE 8 | ENE 12 | S 9 | E 12 | E 12 | SSE 7 | ESE 13 | ESE 13 | ESE 14 |
| kJ | 1733 | 1207 | 633 | 248 | 344 | 121 | 81 | 51 | 5 | 8 | 6 | 81 | 103 | 106 | 567 | 178 | 233 | 167 | 1013 | 1778 | 2582 |
Swell 2 Height (m) Direction Period (s) | ESE 11 | ESE 11 | ESE 11 | S 11 | ESE 11 | S 9 | SSE 11 | SSE 10 | S 10 | S 9 | ESE 12 | ESE 13 | ENE 12 | SE 17 | E 11 | SE 14 | SSW 8 | E 12 | SSE 7 | SSW 11 | SSW 11 |
| kJ | 69 | 70 | 47 | 112 | 22 | 44 | 40 | 22 | 17 | 15 | 13 | 16 | 30 | 107 | 119 | 214 | 77 | 235 | 118 | 140 | 109 |
Swell 3 Height (m) Direction Period (s) | — | — | — | ESE 11 | E 14 | ESE 12 | ESE 12 | NE 4 | SSW 9 | ESE 11 | SW 8 | SW 16 | SE 13 | NE 9 | SE 16 | SSW 15 | SE 14 | ESE 13 | SSW 12 | — | — |
| kJ | — | — | — | 22 | 4 | 26 | 13 | 2 | 8 | 12 | 3 | 11 | 27 | 27 | 201 | 47 | 197 | 229 | 111 | — | — |
Wind waves Height (m) Direction Period (s) | — | — | NNW 3 | — | — | — | NNE 3 | — | NNW 3 | N 3 | NE 6 | NNW 3 | SW 4 | SSW 9 | — | S 8 | SSE 7 | — | SSW 12 | SSW 11 | SSW 11 |
| kJ | — | — | 8 | — | — | — | 1 | — | 2 | 5 | 25 | 1 | 37 | 1356 | — | 239 | 150 | — | 436 | 435 | 379 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 19 | 0 | 0 | 24 | 155 | 139 | 166 | 24 | 0 | 164 | 0 | 24 | 99 | 100 | 99 | 99 | 0 |
Best forecast wave conditions in The Wairarapa | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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Information about the Castlepoint - Slippery Surf forecast
The above surf forecast table for Castlepoint - Slippery provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Castlepoint - Slippery can be found by selecting the local surf guide option on the grey menu. Our Castlepoint - Slippery 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 - Slippery) 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 - Slippery 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 - Slippery, camping, hotels and holiday cottages in The Wairarapa, consider staying in Masterton which is 49 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 78 km (48 miles) away and Levin, 85 km (53 miles) away.
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