Surf Forecasts:
Shag Beach surf forecast from 12 Jun 2026:
- Best quality surf: Wednesday 17 Jun, 3AM (local time) - 6ft (1.8m), 13s period, SSW swell with offshore winds.
- Most powerful swell: Monday 15 Jun, 9AM (local time) - 7ft (2.2m), 17s period, SSW swell with 2,968 kJ wave energy.
- Next surfable swell (1★+): Saturday 13 Jun, 12PM (local time) - 1.5ft (0.5m), 15s period with S swell.
Best Forecast Surf Conditions for Shag Beach this week:
The surf forecast for Shag Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Jun 13) at 12PM. The primary swell is predicted to be 0.5m and 15s period with a secondary swell of 0.4m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Shag Beach in the next 16 days are 2.2m 17s and forecast to arrive on Monday (Jun 15) at 9AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Monday (Jun 15) at 12PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Sat 13th Jun) | 1.5ft (0.5m) 15s |
| Best Surf | 3AM (Wed 17th Jun) | 6ft (1.8m) 13s |
| Most Powerful | 9AM (Mon 15th Jun) | 7ft (2.2m) 17s |
Table - best surf conditions forecast for Shag Beach over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 6mm), mostly falling on Mon morning. Very mild (max 16°C on Sun afternoon, min 6°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 13°C on Thu afternoon, min 5°C on Tue morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||
AM | 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) | S 16 | S 15 | SSW 14 | S 12 | S 12 | S 14 | SSW 17 | S 16 | S 8 | S 9 | S 10 | S 11 | SSW 13 | SSW 13 | S 11 | S 14 | S 14 | S 16 | S 12 | S 12 | S 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 124 | 109 | 143 | 110 | 139 | 107 | 2968 | 509 | 205 | 234 | 179 | 231 | 2026 | 1279 | 836 | 1472 | 1411 | 2123 | 930 | 456 | 692 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross | off | off | cross-off | off | off | cross-off | off | cross-off | cross | cross-off |
High Tide | 1:13PM1.86m | 1:36AM1.78m | 2:09PM1.96m | 2:31AM1.83m | 3:04PM2.02m | 3:26AM1.86m | 4:00PM2.04m | 4:21AM1.87m | 4:56PM2.02m | 5:18AM1.84m | 5:53PM1.97m | 6:16AM1.80m | 6:50PM1.89m | ||||||||
Low Tide | 7:26PM0.15m | 7:46AM0.06m | 8:24PM0.11m | 8:42AM0.01m | 9:22PM0.09m | 9:40AM-0.02m | 10:20PM0.08m | 10:38AM-0.03m | 11:18PM0.08m | 11:37AM-0.01m | 00:16AM0.10m | 12:36PM0.04m | 1:13AM0.14m | ||||||||
 |  |  | | |  |  |  |  | | | | | | | | | | | | | |
 | 8:12 | — | — | 8:14 | — | — | 8:14 | — | — | 8:15 | — | — | 8:15 | — | — | 8:15 | — | — | 8:15 | — | — |
 | — | 4:59 | — | — | 4:59 | — | — | 4:59 | — | — | 4:59 | — | — | 4:59 | — | — | 4:59 | — | — | 4:59 | — |
mm | — | — | — | — | — | 2 | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 10 | 10 | 9 | 14 | 16 | 15 | 11 | 10 | 8 | 7 | 9 | 10 | 10 | 10 | 8 | 10 | 13 | 9 | 8 | 10 | 13 |
Feels °C | 9 | 7 | 6 | 10 | 12 | 12 | 5 | 4 | 3 | 3 | 5 | 5 | 4 | 4 | 3 | 7 | 9 | 5 | 4 | 7 | 7 |
Swell 1 Height (m) Direction Period (s) | S 10 | S 15 | SSW 14 | S 12 | S 12 | S 11 | NE 4 | S 16 | S 15 | S 9 | S 10 | S 11 | E 13 | E 12 | S 11 | S 14 | S 14 | S 16 | S 12 | S 12 | S 16 |
| kJ | 51 | 109 | 143 | 110 | 139 | 57 | 1 | 509 | 155 | 234 | 179 | 231 | 13 | 3 | 836 | 1472 | 1411 | 2123 | 930 | 456 | 692 |
Swell 2 Height (m) Direction Period (s) | S 16 | SSW 7 | SSE 9 | S 17 | S 16 | NE 5 | SE 13 | SE 12 | SE 12 | SSW 14 | S 13 | S 14 | — | — | E 12 | — | — | SSW 16 | S 16 | SSW 11 | S 11 |
| kJ | 124 | 17 | 8 | 52 | 45 | 11 | 7 | 6 | 5 | 63 | 112 | 97 | — | — | 3 | — | — | 561 | 243 | 173 | 229 |
Swell 3 Height (m) Direction Period (s) | NNE 3 | SSE 10 | S 19 | NE 3 | SE 12 | S 14 | SE 13 | NE 6 | NE 5 | SE 11 | E 14 | NNE 4 | — | — | — | — | — | — | E 20 | S 16 | NE 4 |
| kJ | 1 | 19 | 29 | 2 | 5 | 107 | 7 | 2 | 1 | 5 | 4 | 1 | — | — | — | — | — | — | 7 | 318 | 2 |
Wind waves Height (m) Direction Period (s) | — | — | NNE 3 | — | NNE 3 | — | SSW 17 | SSW 6 | S 8 | — | N 2 | W 3 | SSW 13 | SSW 13 | — | — | — | — | — | NNE 4 | NW 2 |
| kJ | — | — | 2 | — | 2 | — | 2968 | 114 | 205 | — | 1 | 4 | 2026 | 1279 | — | — | — | — | — | 11 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 53 | 0 | 0 | 0 | 0 | 140 | 112 | 0 | 0 | 24 | 0 | 0 | 45 | 0 | 0 | 15 | 0 | 0 | 38 | 0 |
Best forecast wave conditions in Otago | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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 Shag Beach 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 Shag Beach Surf forecast
The above surf forecast table for Shag Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Shag Beach can be found by selecting the local surf guide option on the grey menu. Our Shag Beach 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 (Shag Beach) 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 Shag Beach 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 Otago? If you are looking for accommodation near Shag Beach, camping, hotels and holiday cottages in Otago, consider staying in Dunedin which is 58 km (36 miles) away.
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