Surf Forecasts:
Shark Alley surf forecast from 4 Aug 2026:
- Best quality surf: Monday 10 Aug, 9AM (local time) - 8ft (2.5m), 10s period, N swell with offshore winds.
- Most powerful swell: Monday 10 Aug, 3AM (local time) - 13ft (4.0m), 10s period, N swell with 2,766 kJ wave energy.
- Next surfable swell (1★+): Monday 10 Aug, 9AM (local time) - 8ft (2.5m), 10s period with N swell.
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 Monday (Aug 10) at 9AM. The primary swell is predicted to be 2.5m and 10s period with a secondary swell of 0.1m and 12s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Shark Alley in the next 16 days are 4.0m 10s and forecast to arrive on Monday (Aug 10) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Wednesday (Aug 05) at 3AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Mon 10th Aug) | 8ft (2.5m) 10s |
| Best Surf | 9AM (Mon 10th Aug) | 8ft (2.5m) 10s |
| Most Powerful | 3AM (Mon 10th Aug) | 13ft (4.0m) 10s |
Table - best surf conditions forecast for Shark Alley over the next 16 days.
Short Range ForecastMostly dry. Very mild (max 13°C on Tue afternoon, min 7°C on Tue night). Winds decreasing (strong winds from the S on Tue night, light winds from the SSW by Wed night). | Days 5-7 Weather SummaryHeavy rain (total 20mm), heaviest during Sun night. Very mild (max 16°C on Sun afternoon, min 9°C on Fri afternoon). Winds increasing (light winds from the W on Fri afternoon, strong winds from the N by Sun afternoon). | |||||||||||||||||||
Tue 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | ||||||||||||||
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) | NE 12 | ENE 12 | SE 7 | SE 6 | ESE 9 | ESE 6 | ESE 7 | ESE 7 | ESE 7 | N 14 | N 13 | N 12 | N 12 | NNW 5 | NNW 6 | N 7 | N 9 | N 10 | N 9 | NNE 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 23 | 14 | 124 | 47 | 7 | 20 | 28 | 26 | 15 | 15 | 14 | 12 | 12 | 39 | 155 | 470 | 1776 | 1431 | 766 | 540 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | cross-off | off | off | off | off | cross-off | cross-off | cross | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | off | off | off |
High Tide | 11:28PM2.20m | 11:50AM2.12m | 00:13AM2.16m | 12:38PM2.09m | 1:03AM2.12m | 1:32PM2.06m | 1:59AM2.08m | 2:36PM2.05m | 3:03AM2.06m | 3:49PM2.08m | 4:13AM2.08m | 4:59PM2.16m | ||||||||
Low Tide | 4:57PM0.63m | 5:32AM0.59m | 5:46PM0.69m | 6:21AM0.59m | 6:43PM0.73m | 7:14AM0.60m | 7:45PM0.75m | 8:11AM0.60m | 8:49PM0.75m | 9:13AM0.59m | 9:55PM0.71m | 10:18AM0.55m | 11:01PM0.65m | |||||||
 |  |  | | | | | | | |  | | |  |  |  |  | | | | |
 | — | — | 7:11 | — | — | 7:09 | — | — | 7:09 | — | — | 7:07 | — | — | 7:07 | — | — | 7:05 | — | — |
 | 5:35 | — | — | 5:36 | — | — | 5:37 | — | — | 5:37 | — | — | 5:38 | — | — | 5:38 | — | — | 5:39 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 19 | — | — | — |
Temp °C | 13 | 11 | 8 | 9 | 10 | 9 | 10 | 10 | 9 | 9 | 11 | 12 | 14 | 15 | 15 | 16 | 16 | 14 | 14 | 14 |
Feels °C | 4 | 1 | 2 | 4 | 6 | 5 | 6 | 6 | 6 | 6 | 7 | 8 | 9 | 9 | 7 | 8 | 15 | 10 | 10 | 13 |
Swell 1 Height (m) Direction Period (s) | NE 12 | ENE 12 | ENE 9 | SE 6 | ESE 6 | ESE 6 | ESE 7 | ESE 7 | ESE 7 | ESE 6 | ESE 6 | ESE 6 | ESE 8 | NE 13 | ENE 13 | ENE 13 | E 12 | N 10 | N 9 | NNE 9 |
| kJ | 23 | 14 | 8 | 47 | 6 | 20 | 28 | 26 | 15 | 8 | 8 | 4 | 7 | 7 | 18 | 16 | 3 | 1431 | 766 | 540 |
Swell 2 Height (m) Direction Period (s) | ENE 8 | ENE 8 | NE 12 | NE 12 | ESE 9 | NE 11 | E 9 | NE 10 | SE 14 | SE 9 | NE 15 | N 12 | NE 14 | N 12 | N 12 | E 9 | SE 12 | NE 12 | E 12 | — |
| kJ | 7 | 6 | 6 | 6 | 7 | 5 | 2 | 4 | 7 | 3 | 8 | 12 | 7 | 3 | 3 | 1 | 6 | 6 | 3 | — |
Swell 3 Height (m) Direction Period (s) | E 17 | — | N 12 | ENE 9 | SSE 5 | E 9 | NE 11 | NE 16 | NE 10 | N 14 | N 13 | NE 16 | N 12 | SE 8 | SE 9 | E 9 | — | E 11 | — | — |
| kJ | 6 | — | 3 | 7 | 2 | 2 | 5 | 10 | 4 | 15 | 14 | 10 | 12 | 3 | 3 | 1 | — | 2 | — | — |
Wind waves Height (m) Direction Period (s) | SW 5 | SSE 5 | SE 7 | SSW 3 | — | — | — | — | — | — | WNW 2 | NW 3 | NNW 4 | NNW 5 | NNW 6 | N 7 | N 9 | WSW 4 | WSW 3 | — |
| kJ | 74 | 59 | 124 | 1 | — | — | — | — | — | — | 1 | 2 | 10 | 39 | 155 | 470 | 1776 | 5 | 2 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 73 | 120 | 82 | 81 | 115 | 115 | 16 | 115 | 115 | 16 | 115 | 117 | 117 | 115 | 313 | 191 | 80 | 0 | 0 | 0 |
Best forecast wave conditions in Great Barrier Island | ||||||||||||||||||||
Best forecast wave conditions in New Zealand | ||||||||||||||||||||
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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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