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Onekaka surfForecast / Nelson – Tasman Bay / New Zealand
12 Day Weather and Surf, issued 11 am Saturday 17 May 2025 NZST
Best Forecast Surf Conditions for Onekaka this week:
The most powerful waves expected at Onekaka in the next 12 days are 3ft 5s and forecast to arrive on Saturday (May 17) at 9PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 10ft 9s period and expected on Sunday (May 18) at 12PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 9PM (Sat 17th May) | 3.5ft (1.0m) 5s |
Table - best surf conditions forecast for Onekaka over the next 12 days.
Saturday 17 | Sunday 18 | Monday 19 | Tuesday 20 | Wednesday 21 | Thursday 22 | Friday 23 | Saturday 24 | Sunday 25 | Monday 26 | Tuesday 27 | Wednesday 28 | |||||||||||||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  | ||||||||||||||||||||||||
| Wave Height (ft) & direction (?) | ||||||||||||||||||||||||||||||||||||
| Period(s) (?) | 4 | 4 | 6 | 9 | 9 | 16 | 8 | 1 | 4 | 3 | 2 | 5 | 4 | 2 | 13 | 13 | 4 | 3 | 14 | 5 | 24 | 15 | 20 | 18 | 4 | 4 | 6 | 7 | 9 | 10 | 13 | 12 | 11 | 10 | 4 | 3 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 13 | 15 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 1 | 25 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 56 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6 | 0 |
Wind (mph) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross | cross | cross- off | cross- off | off | off | on | off | glass | cross- on | glass | glass | glass | cross- off | off | on | off | off | glass | off | cross- off | glass | cross- off | glass | cross- on | cross- off | cross | cross | cross | cross- on | cross | glass | cross | cross | glass |
High Tide / height (ft) | 12:05PM 12.4 | 12:19AM 12.86 | 12:52PM 11.91 | 1:04AM 12.21 | 1:46PM 11.42 | 2:00AM 11.75 | 2:50PM 11.09 | 3:08AM 11.65 | 3:58PM 11.16 | 4:20AM 12.01 | 5:04PM 11.65 | 5:26AM 12.66 | 6:08PM 12.47 | 6:24AM 13.48 | 7:08PM 13.48 | 7:18AM 14.24 | 8:05PM 14.5 | 8:10AM 14.83 | 8:56PM 15.32 | 9:01AM 15.13 | 9:44PM 15.75 | 9:51AM 15.06 | 10:29PM 15.78 | |||||||||||||
Low Tide / height (ft) | 6:13PM 2.66 | 6:13AM 2.89 | 6:59PM 2.99 | 7:06AM 3.45 | 7:49PM 3.28 | 8:12AM 3.84 | 8:46PM 3.51 | 9:28AM 3.77 | 9:56PM 3.54 | 10:42AM 3.22 | 11:12PM 3.12 | 11:46AM 2.36 | 12:17AM 2.26 | 12:39PM 1.54 | 1:12AM 1.31 | 1:29PM 0.85 | 2:02AM 0.46 | 2:19PM 0.49 | 2:49AM 0 | 3:09PM 0.39 | 3:36AM -0.03 | 4:00PM 0.59 | ||||||||||||||
Saturday 17 | Sunday 18 | Monday 19 | Tuesday 20 | Wednesday 21 | Thursday 22 | Friday 23 | Saturday 24 | Sunday 25 | Monday 26 | Tuesday 27 | Wednesday 28 | |||||||||||||||||||||||||
| Sunrise | 7:30 | - | - | 7:31 | - | - | 7:31 | - | - | 7:33 | - | - | 7:33 | - | - | 7:35 | - | - | 7:35 | - | - | 7:35 | - | - | 7:37 | - | - | 7:37 | - | - | 7:39 | - | - | 7:39 | - | - |
| Sunset | - | 5:20 | - | - | 5:19 | - | - | 5:17 | - | - | 5:16 | - | - | 5:15 | - | - | 5:15 | - | - | 5:15 | - | - | 5:14 | - | - | 5:13 | - | - | 5:13 | - | - | 5:12 | - | - | 5:12 | - |
 |  |  |  | |  | |  | | | |  | | | | | | | | | | | | | | |  | | | |  | | |  | | | |
Rain (in) | - | - | 1.7 | 0.3 | - | - | - | 0.0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0.1 | 0.1 | 0.1 | 0.2 | 1.1 | 2.0 | 0.9 | 0.1 | 0.0 | - |
| Temp. °F | 63 | 63 | 64 | 63 | 64 | 50 | 55 | 55 | 50 | 57 | 57 | 52 | 55 | 55 | 50 | 57 | 57 | 50 | 57 | 57 | 54 | 61 | 59 | 54 | 57 | 57 | 59 | 61 | 61 | 61 | 63 | 63 | 61 | 52 | 52 | 54 |
| Feels °F (?) | 57 | 57 | 57 | 63 | 61 | 45 | 50 | 50 | 46 | 54 | 54 | 48 | 54 | 54 | 46 | 55 | 54 | 46 | 55 | 55 | 50 | 59 | 57 | 50 | 57 | 55 | 55 | 55 | 57 | 55 | 55 | 55 | 61 | 48 | 50 | 52 |
Short Range Forecast: Heavy rain (total 2.0in), heaviest during Sat night. Very mild (max 64°F on Sat night, min 45°F on Mon night). Winds decreasing (fresh winds from the NW on Sat night, calm by Mon afternoon). | Days 3-6 Weather Summary Mostly dry. Very mild (max 57°F on Tue morning, min 46°F on Thu night). Wind will be generally light. | Days 6-9 Weather Summary Light rain (total 0.1in), mostly falling on Sun night. Very mild (max 61°F on Sat morning, min 48°F on Fri morning). Wind will be generally light. | Long Range Forecast: Heavy rain (total 4.4in), heaviest during Tue afternoon. Very mild (max 63°F on Tue morning, min 52°F on Wed morning). Mainly fresh winds. | |||||||||||||||||||||||||||||||||
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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 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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