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Surf Forecasts:
Shark Alley surfForecast / Great Barrier Island / New Zealand
16 Day Weather and Surf, issued 6 am Saturday 21 Mar 2026 NZDTForecast update in hr min s Forecast update imminent
Shark Alley surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Shark Alley sea temperature is
20.5° C
(Which is slightly warmer than usual)Best Forecast Surf Conditions for Shark Alley this week:
The surf forecast for Shark Alley over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Mar 21) at 4PM. The primary swell is predicted to be 0.9m and 10s period with a secondary swell of 0.4m and 14s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Shark Alley in the next 16 days are 3.0m 8s and forecast to arrive on Friday (Mar 27) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Saturday (Mar 28) at 7AM.
| Wave Type | Time (NZDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4PM (Sat 21st Mar) | 3ft (0.9m) 10s |
| Best Surf | 1PM (Fri 27th Mar) | 5.5ft (1.7m) 8s |
| Most Powerful | 1AM (Fri 27th Mar) | 10ft (3.0m) 8s |
Table - best surf conditions forecast for Shark Alley over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Light rain (total 2mm), mostly falling on Sun night. Warm (max 20°C on Sat afternoon, min 18°C on Mon morning). Winds increasing (calm on Sat afternoon, fresh winds from the E by Mon night). | Days 3-6 Weather Summary Heavy rain (total 27mm), heaviest during Thu afternoon. Warm (max 20°C on Wed afternoon, min 19°C on Tue morning). Mainly strong winds. | ||||||||||||||||||||
Saturday 21 | Sunday 22 | Monday 23 | Tuesday 24 | Wednesday 25 | Thursday 26 | Friday 27 | |||||||||||||||
| 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 | 9 | 9 | 9 | 8 | 5 | 5 | 6 | 6 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 188 | 153 | 85 | 59 | 76 | 55 | 92 | 99 | 171 | 273 | 383 | 545 | 766 | 730 | 689 | 939 | 864 | 1237 | 574 | 236 | 156 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | glass | on | cross | on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | on | on | on | on | cross- on | cross- on | off | off |
High Tide / height (m) | 10:16PM 2.33 | 10:38AM 2.35 | 11:04PM 2.34 | 11:27AM 2.31 | 11:53PM 2.32 | 12:18PM 2.26 | 12:45AM 2.27 | 1:12PM 2.19 | 1:40AM 2.21 | 2:09PM 2.12 | 2:41AM 2.15 | 3:10PM 2.08 | 3:48AM 2.12 | ||||||||
Low Tide / height (m) | 3:52PM 0.39 | 4:11AM 0.42 | 4:38PM 0.37 | 4:59AM 0.45 | 5:26PM 0.38 | 5:52AM 0.51 | 6:17PM 0.43 | 6:50AM 0.58 | 7:12PM 0.50 | 7:53AM 0.65 | 8:11PM 0.57 | 8:57AM 0.69 | 9:16PM 0.62 | ||||||||
Saturday 21 | Sunday 22 | Monday 23 | Tuesday 24 | Wednesday 25 | Thursday 26 | Friday 27 | |||||||||||||||
| Sunrise | 7:20 | - | - | 7:20 | - | - | 7:22 | - | - | 7:22 | - | - | 7:24 | - | - | 7:24 | - | - | 7:26 | - | - |
| Sunset | - | 7:29 | - | - | 7:27 | - | - | 7:25 | - | - | 7:23 | - | - | 7:22 | - | - | 7:22 | - | - | 7:20 | - |
 | |  | | |  |  |  |  | | |  |  | | |  | |  |  | | | |
Rain (mm) | - | - | - | - | - | 1 | 1 | - | - | - | - | 1 | - | - | 2 | 7 | 7 | 10 | 1 | - | - |
| Temp. °C | 19 | 20 | 20 | 19 | 20 | 20 | 19 | 18 | 18 | 19 | 19 | 19 | 19 | 20 | 19 | 19 | 19 | 20 | 21 | 22 | 21 |
| Feels °C (?) | 18 | 21 | 20 | 19 | 21 | 20 | 15 | 14 | 12 | 12 | 13 | 13 | 14 | 15 | 14 | 13 | 13 | 17 | 21 | 23 | 20 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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 Shark Alley 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 Shark Alley Surf forecast
The above surf forecast table for Shark Alley provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Shark Alley can be found by selecting the local surf guide option on the grey menu. Our Shark Alley 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 (Shark Alley) 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 Shark Alley 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.
Shark Alley is 88 km (55 miles) from the city of Northshore. If you plan a holiday in Great Barrier Island, look for hotels and other accommodation in Northshore. Northshore has rooms for a wide range of budgets as well as car hire and transport links.
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