Surf Forecasts:
Stewart Island - Saber Reef surf forecast from 5 Sep 2026:
- Best quality surf: Saturday 12 Sep, 12PM (local time) - 28ft (8.5m), 16s period, SW swell with cross-onshore winds.
- Most powerful swell: Saturday 12 Sep, 12PM (local time) - 28ft (8.5m), 16s period, SW swell with 33,447 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 12PM (local time) - 28ft (8.5m), 16s period with SW swell.
Best Forecast Surf Conditions for Stewart Island - Saber Reef this week:
The surf forecast for Stewart Island - Saber Reef over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Sep 12) at 12PM. The primary swell is predicted to be 8.5m and 16s period. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Stewart Island - Saber Reef in the next 16 days are 8.5m 16s and forecast to arrive on Saturday (Sep 12) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 9.5m 16s period and expected on Saturday (Sep 12) at 12AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Sat 12th Sep) | 28ft (8.5m) 16s |
| Best Surf | 12PM (Sat 12th Sep) | 28ft (8.5m) 16s |
| Most Powerful | 12PM (Sat 12th Sep) | 28ft (8.5m) 16s |
Table - best surf conditions forecast for Stewart Island - Saber Reef over the next 16 days.
Short Range ForecastLight rain (total 4mm), mostly falling on Sat afternoon. Very mild (max 10°C on Sat afternoon, min 7°C on Sun night). Winds decreasing (near gales from the WNW on Sat afternoon, light winds from the SSW by Sun morning). | Days 5-7 Weather SummaryHeavy rain (total 38mm), heaviest during Wed afternoon. Very mild (max 10°C on Tue afternoon, min 7°C on Wed afternoon). Winds increasing (light winds from the WNW on Tue afternoon, gales from the WSW by Fri morning). | |||||||||||||||||||
Sat 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | ||||||||||||||
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) | SSW 18 | SSW 18 | SSW 17 | S 16 | SSW 16 | S 15 | S 8 | S 8 | S 8 | S 8 | W 5 | S 18 | ENE 10 | SSW 22 | S 20 | SSW 19 | SSW 19 | S 18 | WSW 15 | WSW 16 |
Wave Graph  | ||||||||||||||||||||
 kJ | 451 | 337 | 232 | 5 | 48 | 17 | 86 | 44 | 55 | 28 | 47 | 26 | 10 | 95 | 276 | 371 | 497 | 246 | 0 | 0 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | on | cross-on | cross | cross-off | on | cross-off | cross | cross | cross-off | cross | cross-off | cross-on | cross-on | cross | cross-on | cross-on | cross-on |
High Tide | 7:36PM1.91m | 8:27AM1.98m | 8:51PM1.97m | 9:39AM2.07m | 9:58PM2.09m | 10:40AM2.18m | 10:56PM2.22m | 11:32AM2.28m | 11:47PM2.33m | 12:19PM2.35m | 00:33AM2.40m | 1:02PM2.38m | 1:17AM2.42m | |||||||
Low Tide | 2:03AM0.47m | 2:43PM0.58m | 3:14AM0.36m | 3:48PM0.46m | 4:15AM0.22m | 4:44PM0.33m | 5:09AM0.09m | 5:33PM0.20m | 5:57AM-0.01m | 6:19PM0.10m | 6:42AM-0.06m | 7:02PM0.06m | ||||||||
 |  |  |  | | | | | | | |  |  |  |  | |  | | |  | |
 | — | — | 7:11 | — | — | 7:09 | — | — | 7:07 | — | — | 7:05 | — | — | 7:03 | — | — | 7:01 | — | — |
 | 6:22 | — | — | 6:23 | — | — | 6:24 | — | — | 6:25 | — | — | 6:28 | — | — | 6:29 | — | — | 6:30 | — |
mm | 4 | — | — | — | — | — | — | — | — | — | — | 5 | 12 | 5 | 4 | 2 | 8 | 2 | 3 | 4 |
Temp °C | 10 | 9 | 9 | 9 | 7 | 8 | 8 | 8 | 9 | 10 | 10 | 10 | 8 | 8 | 7 | 7 | 9 | 8 | 7 | 7 |
Feels °C | -2 | 1 | 5 | 5 | 2 | 3 | 3 | 5 | 5 | 6 | 0 | -1 | 0 | -1 | -4 | -4 | -2 | -6 | -7 | -7 |
Swell 1 Height (m) Direction Period (s) | SSW 18 | WSW 16 | WSW 16 | WSW 15 | WSW 14 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 11 | W 11 | WSW 18 | WSW 11 | WSW 22 | WSW 18 | SSW 19 | WSW 18 | S 18 | — | — |
| kJ | 451 | 17082 | 9613 | 6569 | 3562 | 1944 | 1207 | 616 | 336 | 313 | 1317 | 759 | 3206 | 595 | 5208 | 371 | 25475 | 246 | — | — |
Swell 2 Height (m) Direction Period (s) | — | SSW 18 | SSW 17 | S 16 | SSW 16 | S 15 | S 8 | S 8 | S 8 | WSW 21 | WSW 19 | SW 13 | WSW 16 | ENE 10 | S 20 | ENE 8 | SSW 19 | — | — | — |
| kJ | — | 337 | 232 | 5 | 48 | 17 | 86 | 44 | 55 | 248 | 584 | 45 | 667 | 30 | 276 | 14 | 497 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | S 15 | E 5 | ENE 6 | S 8 | S 8 | S 18 | ENE 10 | SSW 22 | ENE 9 | — | — | — | — | — |
| kJ | — | — | — | — | — | — | 4 | 11 | 12 | 28 | 10 | 26 | 10 | 95 | 16 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 16 | — | — | — | — | — | — | — | — | — | W 5 | W 9 | — | WSW 14 | WSW 14 | WSW 18 | — | WSW 17 | WSW 15 | WSW 16 |
| kJ | 27795 | — | — | — | — | — | — | — | — | — | 47 | 2189 | — | 9270 | 10265 | 24504 | — | 26296 | 25688 | 46912 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 224 | 145 | 90 | 90 | 89 | 94 | 94 | 89 | 89 | 92 | 119 | 89 | 145 | 119 | 145 | 270 | 92 | 306 | 562 | 567 |
Best forecast wave conditions in Southland | ||||||||||||||||||||
Best forecast wave conditions in New Zealand | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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Information about the Stewart Island - Saber Reef Surf forecast
The above surf forecast table for Stewart Island - Saber Reef provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Stewart Island - Saber Reef can be found by selecting the local surf guide option on the grey menu. Our Stewart Island - Saber Reef 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 (Stewart Island - Saber Reef) 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 Stewart Island - Saber Reef 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.
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