Surf Forecasts:
How big are the waves at Shag Beach today (20 Aug):
- Morning surf: Morning surf (20 Aug, local time) - 5ft (1.5m), 10s period with S swell.
- Afternoon surf: Afternoon surf (20 Aug, local time) - 2.5ft (0.8m), 16s period with S swell.
- Evening surf: Evening surf (20 Aug, local time) - 4.5ft (1.3m), 15s period with S swell.
The current surf forecast for Shag Beach at 8PM is: 1.3m 15s primary swell from a South direction and 0.2m 9s secondary swell from a East direction (forecast issued at 11:00am August 20). An open ocean swell of 0.3m 2s is not directed at the surf break. The wind direction is predicted to be cross-offshore and the swell rating is 3.
| Time (NZST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Aug) | 5ft (1.5m) | 10s |
| Afternoon (20 Aug) | 2.5ft (0.8m) | 16s |
| Evening (20 Aug) | 4.5ft (1.3m) | 15s |
Table - waves today at Shag Beach. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Very mild (max 15°C on Sat afternoon, min 6°C on Thu night). Winds increasing (calm on Thu afternoon, fresh winds from the NW by Sat night). | |||||||||||||||||||||
Thu 20 | Friday 21 | Saturday 22 | |||||||||||||||||||
9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | S 10 | S 10 | S 16 | S 16 | S 15 | S 14 | S 13 | S 12 | S 11 | S 11 | S 10 | S 10 | S 10 | S 10 | S 10 | S 10 | S 10 | S 10 | S 10 | NE 6 | NE 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 479 | 361 | 325 | 313 | 750 | 518 | 473 | 322 | 284 | 274 | 216 | 200 | 162 | 128 | 130 | 98 | 71 | 70 | 48 | 148 | 147 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | glassy | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross | cross | cross-off |
High Tide | 9:09AM1.51m | 9:35PM1.44m | 10:11AM1.51m | 10:35PM1.44m | 11:08AM1.53m | ||||||||||||||||
Low Tide | 3:21PM0.48m | 3:43AM0.46m | 4:18PM0.51m | 4:36AM0.47m | 5:11PM0.51m | ||||||||||||||||
 | | |  |  | | | |  | |  | | |  | | | | | | | | |
 | 7:26 | — | — | — | — | — | — | 7:24 | — | — | — | — | — | — | — | 7:24 | — | — | — | — | — |
 | — | — | 5:52 | — | — | — | — | — | — | — | 5:53 | — | — | — | — | — | — | — | 5:54 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 8 | 10 | 11 | 9 | 8 | 8 | 7 | 6 | 7 | 9 | 11 | 11 | 10 | 9 | 10 | 10 | 10 | 14 | 15 | 12 | 11 |
Feels °C | 4 | 6 | 9 | 5 | 4 | 5 | 4 | 3 | 3 | 5 | 7 | 7 | 6 | 4 | 4 | 4 | 5 | 9 | 10 | 9 | 7 |
Swell 1 Height (m) Direction Period (s) | S 10 | S 10 | S 10 | S 10 | S 15 | S 14 | S 13 | S 12 | S 11 | S 11 | S 10 | S 10 | S 10 | S 10 | S 10 | S 10 | S 10 | S 10 | S 10 | SSE 9 | SSE 9 |
| kJ | 479 | 361 | 228 | 181 | 750 | 518 | 473 | 322 | 284 | 274 | 216 | 200 | 162 | 128 | 130 | 98 | 71 | 70 | 48 | 29 | 28 |
Swell 2 Height (m) Direction Period (s) | S 16 | S 16 | S 16 | S 16 | E 9 | E 8 | E 9 | E 9 | E 9 | NE 4 | E 10 | E 11 | ESE 10 | NE 4 | NE 4 | S 13 | NE 5 | S 13 | S 19 | S 16 | S 16 |
| kJ | 85 | 132 | 325 | 313 | 6 | 6 | 6 | 6 | 6 | 2 | 8 | 20 | 10 | 6 | 6 | 14 | 8 | 3 | 7 | 20 | 21 |
Swell 3 Height (m) Direction Period (s) | E 9 | E 9 | E 9 | E 9 | ESE 12 | ESE 12 | ESE 12 | SE 12 | SE 12 | E 8 | SE 12 | ESE 11 | SSW 14 | E 10 | E 10 | E 10 | S 13 | S 18 | E 16 | E 15 | E 14 |
| kJ | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 6 | 6 | 6 | 5 | 22 | 20 | 8 | 7 | 7 | 14 | 7 | 5 | 17 | 16 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NNW 2 | NNW 3 | N 3 | N 3 | NNE 3 | NNE 4 | NE 4 | NE 4 | NNE 4 | NW 2 | NNW 2 | NNE 4 | NNW 3 | NNE 5 | NNE 4 | NE 6 | NE 6 |
| kJ | — | — | — | — | 1 | 1 | 1 | 1 | 1 | 8 | 4 | 6 | 10 | 1 | 1 | 12 | 1 | 17 | 32 | 148 | 147 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 45 | 0 | 0 | 0 | 0 | 0 | 53 | 58 | 53 | 0 | 15 | 0 | 15 | 15 | 53 | 53 | 53 | 0 |
Best forecast wave conditions in Otago | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
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