Surf Forecasts:
Stewart Island - Saber Reef surf forecast from 18 Jul 2026:
- Best quality surf: Monday 20 Jul, 12AM (local time) - 15ft (4.5m), 15s period, SW swell with cross-onshore winds.
- Most powerful swell: Monday 20 Jul, 6AM (local time) - 15ft (4.5m), 17s period, SW swell with 10,934 kJ wave energy.
- Next surfable swell (1★+): Monday 20 Jul, 12AM (local time) - 15ft (4.5m), 15s 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 Monday (Jul 20) at 12AM. The primary swell is predicted to be 4.5m and 15s period with a secondary swell of 0.5m and 13s. 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 4.5m 17s and forecast to arrive on Monday (Jul 20) at 6AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.5m 14s period and expected on Friday (Jul 24) at 6AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Mon 20th Jul) | 15ft (4.5m) 15s |
| Best Surf | 12AM (Mon 20th Jul) | 15ft (4.5m) 15s |
| Most Powerful | 6AM (Mon 20th Jul) | 15ft (4.5m) 17s |
Table - best surf conditions forecast for Stewart Island - Saber Reef over the next 16 days.
Short Range ForecastHeavy rain (total 22mm), heaviest during Sat afternoon. Very mild (max 12°C on Tue morning, min 8°C on Sat night). Winds increasing (light winds from the WNW on Mon morning, near gales from the NW by Mon night). | Days 5-7 Weather SummaryHeavy rain (total 20mm), heaviest during Thu afternoon. Very mild (max 11°C on Tue afternoon, min 7°C on Thu night). Winds increasing (light winds from the NW on Tue night, strong winds from the WNW by Fri morning). | |||||||||||||||||||
Sat 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | ||||||||||||||
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) | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 16 | SW 14 | SW 13 | SW 12 | S 10 | ESE 12 | ESE 11 | SE 11 | SE 11 | E 13 | E 6 | ENE 7 | ESE 12 | ESE 12 | SW 13 |
Wave Graph  | ||||||||||||||||||||
 kJ | 15176 | 8275 | 6324 | 8033 | 8754 | 8008 | 5044 | 1919 | 986 | 35 | 13 | 12 | 5 | 5 | 3 | 16 | 15 | 14 | 28 | 755 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | on | cross-on | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross | cross-on | cross-off | cross-off | off | cross-off | cross-on | cross-off | cross-on | cross | cross-off |
High Tide | 4:31AM2.26m | 5:02PM2.17m | 5:23AM2.12m | 5:52PM2.04m | 6:17AM1.99m | 6:45PM1.93m | 7:15AM1.88m | 7:41PM1.85m | 8:18AM1.82m | 8:41PM1.80m | 9:21AM1.81m | 9:40PM1.80m | ||||||||
Low Tide | 10:16PM0.21m | 10:43AM0.16m | 11:09PM0.31m | 11:36AM0.32m | 00:04AM0.43m | 12:32PM0.48m | 1:01AM0.53m | 1:31PM0.61m | 2:02AM0.60m | 2:31PM0.69m | 3:01AM0.63m | 3:30PM0.71m | ||||||||
 |  |  |  |  |  | |  |  | | | | |  | |  | | | |  | |
 | — | — | 8:26 | — | — | 8:25 | — | — | 8:23 | — | — | 8:22 | — | — | 8:22 | — | — | 8:21 | — | — |
 | 5:22 | — | — | 5:22 | — | — | 5:23 | — | — | 5:24 | — | — | 5:27 | — | — | 5:28 | — | — | 5:29 | — |
mm | 13 | 6 | — | — | — | — | — | — | 3 | 2 | — | 1 | — | 1 | 4 | 9 | 3 | — | 2 | 7 |
Temp °C | 11 | 9 | 9 | 9 | 10 | 8 | 9 | 11 | 12 | 11 | 10 | 11 | 11 | 10 | 11 | 9 | 9 | 8 | 9 | 10 |
Feels °C | 3 | 4 | 2 | 2 | 5 | 4 | 3 | 1 | 3 | 3 | 3 | 7 | 7 | 6 | 5 | 2 | 5 | -2 | -1 | 2 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 16 | SW 14 | SW 13 | SW 12 | S 10 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 13 | WNW 10 | ENE 7 | WSW 14 | WSW 13 | SW 13 |
| kJ | 15176 | 8275 | 6324 | 8033 | 8754 | 8008 | 5044 | 1919 | 986 | 35 | 2301 | 2315 | 2403 | 1407 | 688 | 748 | 15 | 6459 | 5436 | 755 |
Swell 2 Height (m) Direction Period (s) | ESE 14 | ESE 14 | WSW 15 | ESE 13 | ESE 13 | ESE 12 | ESE 12 | S 12 | S 11 | ESE 12 | ESE 12 | ESE 11 | W 18 | SE 11 | WNW 8 | WSW 13 | SE 11 | E 7 | W 16 | ESE 13 |
| kJ | 389 | 352 | 911 | 195 | 95 | 85 | 57 | 174 | 58 | 13 | 13 | 12 | 25 | 5 | 202 | 762 | 5 | 8 | 251 | 33 |
Swell 3 Height (m) Direction Period (s) | — | — | ESE 14 | — | — | — | — | ESE 12 | ESE 12 | — | — | — | SE 11 | SE 10 | E 13 | E 6 | W 16 | ESE 12 | ESE 12 | SW 13 |
| kJ | — | — | 207 | — | — | — | — | 28 | 27 | — | — | — | 5 | 4 | 3 | 16 | 21 | 14 | 28 | 572 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | WNW 6 | WNW 8 | WSW 10 | WSW 12 | — | — | NE 3 | NE 3 | NE 6 | W 12 | — | WNW 4 | W 16 |
| kJ | — | — | — | — | — | — | — | 361 | 1241 | 2142 | 3156 | — | — | 5 | 6 | 59 | 2324 | — | 7 | 6548 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 221 | 145 | 174 | 145 | 145 | 89 | 89 | 89 | 89 | 89 | 92 | 92 | 89 | 89 | 89 | 95 | 89 | 145 | 119 | 95 |
Best forecast wave conditions in Southland | ||||||||||||||||||||
Best forecast wave conditions in New Zealand | ||||||||||||||||||||
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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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