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The Island (Island Bay) surfForecast / Wellington / New Zealand
12 Day Weather and Surf, issued 11 am Thursday 18 Sep 2025 NZST
Best Forecast Surf Conditions for The Island (Island Bay) this week:
The surf forecast for The Island (Island Bay) over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Sep 20) at 12AM. The primary swell is predicted to be 1.6m and 9s period with a secondary swell of 0.4m and 10s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at The Island (Island Bay) in the next 12 days are 1.8m 13s and forecast to arrive on Saturday (Sep 20) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 8s period and expected on Sunday (Sep 21) at 9PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sat 20th Sep) | 5ft (1.6m) 9s |
| Best Surf | 12AM (Sat 20th Sep) | 5ft (1.6m) 9s |
| Most Powerful | 6AM (Sat 20th Sep) | 6ft (1.8m) 13s |
Table - best surf conditions forecast for The Island (Island Bay) over the next 12 days.
Short Range Forecast Light rain (total 4mm), mostly falling on Thu night. Very mild (max 15°C on Thu morning, min 7°C on Fri night). Winds increasing (light winds from the ENE on Fri night, near gales from the NNW by Sat night). | Days 3-6 Weather Summary Moderate rain (total 17mm), heaviest on Mon morning. Very mild (max 14°C on Sun morning, min 11°C on Mon night). Winds decreasing (near gales from the NNW on Sun morning, moderate winds from the NNW by Mon night). | ||||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||
| 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 (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 10 | 10 | 6 | 8 | 9 | 9 | 13 | 12 | 13 | 11 | 10 | 10 | 14 | 14 | 14 | 13 | 13 | 14 | 15 | 14 | 13 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 50 | 65 | 270 | 814 | 809 | 417 | 809 | 584 | 555 | 154 | 53 | 8 | 4 | 20 | 20 | 17 | 16 | 20 | 20 | 62 | 86 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | cross- on | cross- on | cross- on | cross- off | cross- off | off | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 1:46PM 1.69 | 2:18AM 1.54 | 2:39PM 1.65 | 3:12AM 1.52 | 3:31PM 1.60 | 4:03AM 1.50 | 4:22PM 1.56 | 4:54AM 1.50 | 5:13PM 1.53 | 5:43AM 1.51 | 6:03PM 1.51 | 6:33AM 1.52 | 6:53PM 1.50 | ||||||||
Low Tide / height (m) | 8:01PM 0.54 | 8:23AM 0.54 | 8:52PM 0.59 | 9:18AM 0.57 | 9:45PM 0.64 | 10:12AM 0.60 | 10:40PM 0.69 | 11:05AM 0.63 | 11:33PM 0.72 | 11:56AM 0.67 | 12:23AM 0.75 | 12:47PM 0.71 | 1:10AM 0.77 | ||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||
| Sunrise | 6:18 | - | - | 6:16 | - | - | 6:13 | - | - | 6:11 | - | - | 6:11 | - | - | 6:09 | - | - | 6:07 | - | - |
| Sunset | - | 6:12 | - | - | 6:13 | - | - | 6:15 | - | - | 6:15 | - | - | 6:16 | - | - | 6:17 | - | - | 6:19 | - |
 | |  | |  |  | | |  |  |  |  | |  |  | | | | | | | |
Rain (mm) | - | - | 4 | - | - | - | - | - | - | - | 1 | 8 | 5 | 1 | 2 | - | - | - | - | - | - |
| Temp. °C | 15 | 14 | 12 | 8 | 9 | 8 | 11 | 11 | 12 | 14 | 14 | 13 | 13 | 12 | 12 | 13 | 13 | 12 | 14 | 14 | 13 |
| Feels °C (?) | 6 | 6 | 8 | -1 | 3 | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 6 | 5 | 5 | 5 | 6 | 6 | 8 | 9 | 8 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Wellington
Cross-off wind 3 km from The Island (Island Bay) has swung offshore (moderate winds from the NNW at Wellington Airport). 0.6m 10s swell from the S with a 0.4m 14s groundswell, also from the S. 2 swells combining to make bigger set waves.- Offshore wind has become cross-off at Lyall Bay (moderate winds from the NNW at Wellington Airport 1 km from Lyall Bay). 0.6m 10s swell from the S with a 0.4m 14s groundswell, also from the S. 2 swells combining to make bigger set waves.
Actual: 42 min ago
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Information about the The Island (Island Bay) Surf forecast
The above surf forecast table for The Island (Island Bay) provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at The Island (Island Bay) can be found by selecting the local surf guide option on the grey menu. Our The Island (Island Bay) 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 (The Island (Island Bay)) 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 The Island (Island Bay) 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.
The Island (Island Bay) is 8 km (5 miles) from the city of Wellington. If you plan a holiday in Wellington, look for hotels and other accommodation in Wellington. Wellington has rooms for a wide range of budgets as well as car hire and transport links.
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