Surf Forecasts:
How big are the waves at Grandma's today (18 Jun):
- Morning surf: Morning surf (18 Jun, local time) - 3.5ft (1.0m), 15s period with S swell.
- Afternoon surf: Afternoon surf (18 Jun, local time) - 3.5ft (1.0m), 14s period with S swell.
- Evening surf: Evening surf (18 Jun, local time) - 3ft (0.9m), 14s period with S swell.
The current surf forecast for Grandma's at 5AM is: 1.0m 16s primary swell from a South direction and 0.3m 10s secondary swell from a Northwest direction (forecast issued at 01:00am June 18). An open ocean swell of 0.7m 5s is not directed at the surf break. The wind direction is predicted to be glassy and the swell rating is 2.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Jun) | 3.5ft (1.0m) | 15s |
| Afternoon (18 Jun) | 3.5ft (1.0m) | 14s |
| Evening (18 Jun) | 3ft (0.9m) | 14s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastSome drizzle, heaviest during Thu afternoon. Warm (max 27°C on Thu afternoon, min 24°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | ||||||||||||||||||||||
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 | 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) | S 16 | S 16 | S 15 | S 14 | S 14 | S 14 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | S 13 | S 13 | S 13 | S 13 | S 16 | S 12 | S 12 | S 16 | S 15 | S 15 | S 15 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 248 | 509 | 484 | 429 | 423 | 423 | 329 | 324 | 315 | 229 | 222 | 219 | 168 | 219 | 168 | 166 | 121 | 134 | 100 | 99 | 124 | 113 | 110 | 110 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | cross-off | glassy | glassy | off | cross-off | off |
High Tide | 7:01AM0.27m | 7:10PM0.75m | 8:09AM0.30m | 7:56PM0.66m | 9:18AM0.36m | 8:42PM0.57m | ||||||||||||||||||
Low Tide | 1:34AM0.02m | 11:45AM0.03m | 2:16AM0.02m | 12:44PM0.10m | 2:55AM0.01m | 1:54PM0.17m | ||||||||||||||||||
 |  |  |  |  | |  | | | | | | | | | | | | | | | | | | |
 | — | 5:45 | — | — | — | — | — | — | — | 5:45 | — | — | — | — | — | — | — | 5:45 | — | — | — | — | — | — |
 | — | — | — | — | — | 7:08 | — | — | — | — | — | — | — | 7:08 | — | — | — | — | — | — | — | 7:08 | — | — |
mm | 1 | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 26 | 26 | 26 | 27 | 26 | 26 | 25 | 25 | 26 | 27 | 27 | 27 | 26 | 25 | 24 | 24 | 25 | 27 | 27 | 27 | 26 | 25 |
Feels °C | 29 | 29 | 30 | 29 | 30 | 31 | 30 | 30 | 29 | 30 | 30 | 30 | 31 | 30 | 30 | 29 | 28 | 27 | 28 | 30 | 30 | 30 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | S 16 | S 15 | S 14 | S 14 | S 14 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | S 13 | S 13 | S 13 | S 13 | S 13 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 |
| kJ | 222 | 509 | 484 | 429 | 423 | 423 | 329 | 324 | 315 | 229 | 222 | 219 | 168 | 219 | 168 | 166 | 121 | 116 | 100 | 99 | 69 | 67 | 68 | 68 |
Swell 2 Height (m) Direction Period (s) | S 16 | NW 10 | NNW 10 | NW 10 | NW 10 | NNW 10 | NNW 10 | SSW 20 | SSW 19 | SSW 19 | SSW 19 | SSW 18 | SSW 18 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | S 16 | SSW 16 | SSW 16 | S 16 | S 15 | S 15 | S 15 |
| kJ | 248 | 17 | 10 | 17 | 16 | 19 | 19 | 75 | 73 | 123 | 71 | 108 | 106 | 104 | 103 | 101 | 90 | 134 | 87 | 86 | 124 | 113 | 110 | 110 |
Swell 3 Height (m) Direction Period (s) | NW 10 | SW 22 | SW 21 | SW 16 | SSW 20 | SSW 20 | SSW 20 | NNW 10 | NW 10 | NW 9 | ESE 6 | ESE 5 | NW 9 | NNW 9 | N 9 | E 4 | E 5 | NNW 9 | NNW 8 | SE 5 | NW 8 | S 20 | NE 5 | ESE 4 |
| kJ | 16 | 18 | 18 | 10 | 40 | 39 | 75 | 9 | 14 | 14 | 3 | 3 | 3 | 8 | 6 | 3 | 2 | 8 | 7 | 1 | 3 | 8 | 6 | 2 |
Wind waves Height (m) Direction Period (s) | E 5 | E 5 | E 5 | E 5 | — | E 5 | — | E 6 | E 5 | E 5 | E 5 | E 5 | SSE 5 | ESE 5 | — | — | — | E 5 | E 5 | E 5 | — | N 8 | ESE 4 | E 4 |
| kJ | 22 | 25 | 34 | 33 | — | 18 | — | 39 | 64 | 74 | 54 | 43 | 5 | 26 | — | — | — | 33 | 30 | 21 | — | 12 | 28 | 40 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 12 | 4 |
Best forecast wave conditions in Maui | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
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