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Surf Forecasts:
Onekaka surfForecast / Nelson – Tasman Bay / New Zealand
12 Day Weather and Surf, issued 5 pm Monday 15 Sep 2025 NZST
Best Forecast Surf Conditions for Onekaka this week:
The most powerful waves expected at Onekaka in the next 12 days are 1.3m 6s and forecast to arrive on Sunday (Sep 21) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 10s period and expected on Sunday (Sep 21) at 6PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 12AM (Sun 21st Sep) | 4.5ft (1.3m) 6s |
Table - best surf conditions forecast for Onekaka over the next 12 days.
Short Range Forecast Moderate rain (total 19mm), heaviest on Wed night. Very mild (max 18°C on Tue afternoon, min 11°C on Tue night). Winds increasing (light winds from the W on Mon night, fresh winds from the NW by Wed night). | Days 3-6 Weather Summary Heavy rain (total 38mm), heaviest during Sun morning. Very mild (max 14°C on Thu afternoon, min 5°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||
Mon 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | |||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |||
Rating (10 max) | |||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||||
| Period(s) (?) | 4 | 3 | 5 | 4 | 17 | 6 | 6 | 7 | 8 | 11 | 8 | 14 | 2 | 12 | 11 | 4 | 6 | 8 | 9 | 10 | 9 | ||
Wave (?)Graph  | |||||||||||||||||||||||
 kJ (?) | 0 | 0 | 22 | 34 | 0 | 36 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 36 | 95 | 0 | 0 | 0 | 0 | ||
Wind (km/h) | |||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross- off | cross- off | cross- off | glass | cross- on | off | cross- off | cross | cross | cross | cross | cross- off | glass | ||
High Tide / height (m) | 3:41AM 3.31 | 4:38PM 3.26 | 5:11AM 3.22 | 6:25PM 3.44 | 6:32AM 3.36 | 7:26PM 3.75 | 7:32AM 3.61 | 8:09PM 4.04 | 8:19AM 3.87 | 8:45PM 4.25 | 8:59AM 4.09 | 9:19PM 4.39 | 9:35AM 4.25 | ||||||||||
Low Tide / height (m) | 9:39PM 1.22 | 9:50AM 1.29 | 11:16PM 1.23 | 11:28AM 1.32 | 12:31AM 1.02 | 12:51PM 1.14 | 1:27AM 0.74 | 1:50PM 0.86 | 2:10AM 0.48 | 2:33PM 0.58 | 2:47AM 0.30 | 3:08PM 0.36 | 3:21AM 0.19 | ||||||||||
Mon 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | |||||||||||||||||
| Sunrise | - | - | 6:28 | - | - | 6:26 | - | - | 6:26 | - | - | 6:24 | - | - | 6:22 | - | - | 6:20 | - | - | 6:18 | ||
| Sunset | 6:17 | - | - | 6:19 | - | - | 6:20 | - | - | 6:21 | - | - | 6:22 | - | - | 6:22 | - | - | 6:23 | - | - | ||
 |  | |  | | |  |  | | |  | | | | | |  |  | |  | | |||
Rain (mm) | - | - | - | - | - | - | - | 19 | - | - | - | - | - | - | - | - | 8 | 30 | 27 | 4 | - | ||
| Temp. °C | 15 | 12 | 17 | 18 | 13 | 15 | 15 | 14 | 14 | 14 | 11 | 12 | 14 | 7 | 14 | 13 | 13 | 13 | 14 | 14 | 15 | ||
| Feels °C (?) | 10 | 9 | 15 | 15 | 10 | 12 | 10 | 9 | 8 | 9 | 7 | 8 | 11 | 4 | 9 | 7 | 9 | 9 | 10 | 12 | 14 | ||
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Recent Eyeball Surf Reports for Nelson - Tasman Bay
The wind is still cross-off at Onekaka (strong winds from the W at FarewellSpitAws 33 km from Onekaka). No surfable waves
33 km away, 1 h 57 min ago
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 Onekaka 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 Onekaka Surf forecast
The above surf forecast table for Onekaka provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Onekaka can be found by selecting the local surf guide option on the grey menu. Our Onekaka 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 (Onekaka) 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 Onekaka 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 Nelson - Tasman Bay? If you are looking for accommodation near Onekaka, camping, hotels and holiday cottages in Nelson - Tasman Bay, consider staying in Nelson which is 76 km (47 miles) away.
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