Surf Forecasts:
Mana Island surf forecast from 17 Aug 2026:
- Best quality surf: Thursday 20 Aug, 6AM (local time) - 1.5ft (0.4m), 12s period, SSW swell with offshore winds.
- Most powerful swell: Wednesday 19 Aug, 12AM (local time) - 7.5ft (2.3m), 11s period, SSW swell with 1,211 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 6AM (local time) - 1.5ft (0.4m), 12s period with SSW swell.
Best Forecast Surf Conditions for Mana Island this week:
The surf forecast for Mana Island over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 6AM. The primary swell is predicted to be 0.4m and 12s period with a secondary swell of 0.2m and 15s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Mana Island in the next 16 days are 2.3m 11s and forecast to arrive on Wednesday (Aug 19) 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 1.6m 5s period and expected on Tuesday (Aug 18) at 3PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Thu 20th Aug) | 1.5ft (0.4m) 12s |
| Best Surf | 6AM (Thu 20th Aug) | 1.5ft (0.4m) 12s |
| Most Powerful | 12AM (Wed 19th Aug) | 7.5ft (2.3m) 11s |
Table - best surf conditions forecast for Mana Island over the next 16 days.
Short Range ForecastSome drizzle, heaviest during Wed morning. Very mild (max 11°C on Tue morning, min 8°C on Mon afternoon). Winds decreasing (gales from the S on Tue afternoon, calm by Thu morning). | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Sat night. Very mild (max 14°C on Sun morning, min 11°C on Thu afternoon). Winds increasing (light winds from the N on Thu afternoon, gales from the NW by Sun morning). | |||||||||||||||||||
Mon 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
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) | WNW 15 | WNW 14 | NW 14 | NW 14 | SSW 11 | SSW 10 | SSW 13 | WNW 15 | SSW 12 | SSW 9 | NW 5 | NW 6 | NW 6 | NW 7 | NW 6 | NW 7 | NW 7 | NW 7 | NW 8 | NW 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 21 | 21 | 8 | 7 | 1211 | 167 | 232 | 22 | 46 | 15 | 49 | 169 | 275 | 255 | 245 | 505 | 642 | 763 | 611 | 328 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | glassy | cross-on | on | on | on | on | on | on | on | on | on | on |
High Tide | 00:37AM1.31m | 12:59PM1.25m | 1:15AM1.22m | 1:40PM1.18m | 2:00AM1.14m | 2:30PM1.11m | 3:00AM1.07m | 3:39PM1.06m | 4:19AM1.03m | 5:10PM1.05m | 5:40AM1.04m | 6:22PM1.09m | ||||||||
Low Tide | 6:33PM0.28m | 6:58AM0.28m | 7:15PM0.37m | 7:37AM0.36m | 8:00PM0.45m | 8:20AM0.44m | 8:54PM0.52m | 9:15AM0.51m | 10:03PM0.57m | 10:33AM0.55m | 11:31PM0.57m | 12:00PM0.53m | 00:43AM0.53m | |||||||
 |  | |  | |  |  |  | | | | | | | | |  |  | |  | |
 | — | — | 7:07 | — | — | 7:05 | — | — | 7:03 | — | — | 7:03 | — | — | 7:01 | — | — | 7:00 | — | — |
 | 5:40 | — | — | 5:42 | — | — | 5:43 | — | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — |
mm | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | 1 | 2 | — | — |
Temp °C | 9 | 9 | 11 | 11 | 9 | 9 | 10 | 10 | 10 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 14 | 13 | 12 |
Feels °C | 2 | 3 | 2 | -1 | -4 | 2 | 4 | 6 | 9 | 8 | 6 | 3 | 3 | 3 | 6 | 6 | 4 | 5 | 3 | 4 |
Swell 1 Height (m) Direction Period (s) | WNW 15 | WNW 14 | NW 14 | NW 14 | NW 13 | SSW 10 | WNW 16 | S 13 | SSW 12 | SSW 9 | SSW 11 | SSW 12 | SSW 13 | SSW 11 | S 11 | S 11 | S 10 | NW 19 | NW 18 | WNW 16 |
| kJ | 21 | 21 | 8 | 7 | 7 | 167 | 25 | 85 | 46 | 15 | 25 | 29 | 32 | 13 | 9 | 9 | 2 | 14 | 12 | 25 |
Swell 2 Height (m) Direction Period (s) | S 14 | S 12 | W 5 | W 7 | — | NW 13 | W 6 | WNW 15 | WNW 14 | S 11 | NW 14 | NW 16 | NW 15 | W 14 | W 14 | — | W 19 | — | — | S 15 |
| kJ | 16 | 3 | 1 | 1 | — | 7 | 1 | 22 | 21 | 10 | 8 | 10 | 9 | 4 | 4 | — | 7 | — | — | 4 |
Swell 3 Height (m) Direction Period (s) | W 7 | W 6 | — | — | — | NW 17 | — | W 5 | — | NW 14 | S 16 | — | — | — | — | — | — | — | — | — |
| kJ | 1 | 1 | — | — | — | 11 | — | 1 | — | 8 | 5 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSW 4 | SSW 3 | SSW 4 | SSW 5 | SSW 11 | S 4 | SSW 13 | — | — | — | NW 5 | NW 6 | NW 6 | NW 7 | NW 6 | NW 7 | NW 7 | NW 7 | NW 8 | NW 8 |
| kJ | 10 | 2 | 16 | 123 | 1211 | 31 | 232 | — | — | — | 49 | 169 | 275 | 255 | 245 | 505 | 642 | 763 | 611 | 328 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 230 | 69 | 69 | 182 | 207 | 86 | 69 | 69 | 0 | 27 | 55 | 69 | 69 | 69 | 69 | 69 | 136 | 128 | 109 | 69 |
Best forecast wave conditions in Wellington | ||||||||||||||||||||
Best forecast wave conditions in New Zealand | ||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Mana Island surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Mana Island Surf forecast
The above surf forecast table for Mana Island provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Mana Island can be found by selecting the local surf guide option on the grey menu. Our Mana Island 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 (Mana Island) 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 Mana Island 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.
Mana Island is 8 km (5 miles) from the city of Porirua. If you plan a holiday in Wellington, look for hotels and other accommodation in Porirua. Porirua has rooms for a wide range of budgets as well as car hire and transport links.
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