Surf Forecasts:
How big are the waves at Grandma's today (19 Sep):
- Morning surf: Morning surf (19 Sep, local time) - 2.5ft (0.7m), 16s period with SW swell.
- Afternoon surf: Afternoon surf (19 Sep, local time) - 2ft (0.6m), 15s period with SSW swell.
- Evening surf: Evening surf (19 Sep, local time) - 2.5ft (0.7m), 16s period with SW swell.
The current surf forecast for Grandma's at 2PM is: 0.5m 16s primary swell from a Southwest direction and 0.5m 15s secondary swell from a South-southwest direction (forecast issued at 07:00am September 19). An open ocean swell of 1.7m 7s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (19 Sep) | 2.5ft (0.7m) | 16s |
| Afternoon (19 Sep) | 2ft (0.6m) | 15s |
| Evening (19 Sep) | 2.5ft (0.7m) | 16s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 29°C on Sat afternoon, min 25°C on Sat night). Wind will be generally light. | |||||||||||||||||||||||
Saturday 19 | Sunday 20 | Monday 21 | |||||||||||||||||||||
5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | |
Swell Height Map |  |  |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | SW 16 | SW 16 | SSW 16 | SW 16 | SW 16 | SW 15 | SW 16 | SSW 15 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | S 13 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 255 | 258 | 334 | 129 | 206 | 242 | 132 | 154 | 371 | 263 | 234 | 292 | 296 | 292 | 284 | 269 | 269 | 265 | 195 | 187 | 184 | 181 | 168 |
Wind (km/h) | |||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross-off | off | off | off | cross-off | cross-off | off | off | off | off | off | off | off | off | off | off | cross-off | cross-off | cross-off | off | off |
High Tide | 11:13AM0.68m | 11:39PM0.32m | 12:07PM0.70m | 00:35AM0.36m | 12:53PM0.72m | ||||||||||||||||||
Low Tide | 3:09AM0.15m | 6:47PM0.20m | 4:22AM0.15m | 7:19PM0.17m | 5:28AM0.14m | 7:45PM0.14m | |||||||||||||||||
 |  |  | | |  | | | |  | | | | | | | | | | | | | | |
 | 6:13 | — | — | — | — | — | — | — | 6:13 | — | — | — | — | — | — | — | 6:13 | — | — | — | — | — | — |
 | — | — | — | — | 6:24 | — | — | — | — | — | — | — | 6:23 | — | — | — | — | — | — | — | 6:22 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 27 | 28 | 29 | 28 | 27 | 26 | 26 | 25 | 26 | 28 | 29 | 28 | 26 | 25 | 25 | 25 | 26 | 28 | 29 | 28 | 26 | 26 |
Feels °C | 28 | 29 | 31 | 32 | 30 | 29 | 27 | 27 | 26 | 27 | 29 | 31 | 29 | 26 | 26 | 26 | 26 | 26 | 29 | 31 | 28 | 27 | 28 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 16 | SSW 16 | SSW 15 | SW 16 | SW 15 | SW 16 | SSW 15 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | S 13 |
| kJ | 255 | 258 | 334 | 123 | 206 | 242 | 124 | 154 | 371 | 263 | 234 | 292 | 296 | 292 | 284 | 269 | 269 | 265 | 195 | 187 | 184 | 181 | 168 |
Swell 2 Height (m) Direction Period (s) | SSW 16 | S 15 | ESE 6 | SW 16 | S 15 | SSW 17 | S 16 | S 16 | SW 15 | SW 15 | SW 15 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SW 14 | SW 14 | NNE 6 | NE 6 | SW 14 | SW 14 | NNE 4 |
| kJ | 83 | 113 | 16 | 129 | 110 | 96 | 132 | 134 | 34 | 34 | 33 | 5 | 5 | 5 | 9 | 10 | 32 | 33 | 6 | 8 | 31 | 31 | 5 |
Swell 3 Height (m) Direction Period (s) | ESE 7 | ESE 7 | SSW 15 | SE 6 | SE 8 | ESE 8 | SSW 13 | SSW 13 | ESE 8 | NNE 7 | ESE 6 | SW 15 | SW 15 | SW 15 | SW 15 | SSW 15 | SE 7 | NNE 6 | SW 14 | SW 14 | SE 5 | ESE 6 | SSW 14 |
| kJ | 9 | 9 | 42 | 9 | 17 | 6 | 70 | 70 | 6 | 4 | 3 | 33 | 33 | 33 | 33 | 21 | 7 | 4 | 32 | 31 | 1 | 3 | 19 |
Wind waves Height (m) Direction Period (s) | E 6 | E 7 | E 7 | E 7 | E 8 | E 8 | E 6 | E 8 | E 9 | E 9 | E 6 | E 6 | E 6 | E 6 | E 6 | E 6 | E 9 | E 9 | E 9 | E 9 | NNE 3 | NNE 4 | E 9 |
| kJ | 141 | 286 | 356 | 266 | 427 | 489 | 202 | 400 | 326 | 399 | 89 | 222 | 222 | 162 | 188 | 181 | 298 | 264 | 299 | 343 | 5 | 8 | 342 |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 12 | 12 | 12 | 12 | 12 | 4 | 4 | 12 | 12 | 4 |
Best forecast wave conditions in Maui | |||||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||||
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