Grandma's surf break

Grandma's surfForecast / HAW – Maui / USA

information circle48hr Weather and Surf, issued 7 am Wednesday 29 Apr 2026 HST
Forecast update in hr  min  s Forecast update imminent
Grandma's surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Grandma's sea temperature is
25.2° C
(Which is slightly warmer than usual)

How big are the waves at Grandma's today?

The current surf forecast for Grandma's at 12PM is: 0.3m 12s primary swell from a Southwest direction (forecast issued at 07:00am April 29). An open ocean swell of 0.4m 13s is not directed at the surf break, a second open ocean swell of 0.9m 7s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (HST) & DateWave HeightWave Period
Morning (29 Apr)1ft (0.3m)12s
Afternoon (29 Apr)0.5ft (0.2m)13s
Evening (29 Apr)0.5ft (0.2m)11s

Table - waves today at Grandma's. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 26°C on Thu afternoon, min 22°C on Wed night). Wind will be generally light.

Wednesday
29
Thursday
30
Friday
1
Sat
2
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
2 AM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
0
1
1
1
1
1
1
1
1
Swell
Height Map
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
Wave
Height (m)
Direction
Period (s)
0.4
SW
12
0.3
SW
12
0.3
SW
12
0.2
S
13
0.2
SSW
11
0.2
SSW
11
0.2
S
18
0.2
S
18
0.2
SSW
13
0.2
SSW
12
0.3
S
16
0.3
SSW
16
0.4
SSW
16
0.3
SSW
16
0.3
SSW
16
0.3
S
15
0.4
S
15
0.4
SSW
15
0.4
SSW
15
0.4
SSW
15
0.4
SSW
16
0.4
SSW
16
0.3
NW
17
0.5
NW
16
Wave Graph
Metric surfscale
Energy kJ
36
22
22
14
12
12
25
25
16
15
46
51
86
51
51
39
68
72
73
76
85
86
50
133
Wind (km/h)
15
NNE
20
NNE
15
NNE
20
NNE
20
NE
15
NNE
15
NNE
15
NNE
20
NE
20
NE
10
NE
10
NE
10
NE
15
NE
15
NNE
15
NNE
15
NNE
15
NE
15
NE
10
NNE
10
ENE
15
NE
15
NE
15
NNE
off
off
cross-off
off
off
off
off
off
off
off
off
off
off
off
cross-off
off
off
off
off
off
cross-off
off
off
off
High Tide
2:15AM0.43m
3:08PM0.64m
2:53AM0.38m
3:44PM0.67m
3:29AM0.34m
4:20PM0.70m
Low Tide
8:06AM-0.04m
9:23PM0.10m
8:32AM-0.04m
10:09PM0.10m
9:00AM-0.04m
10:55PM0.10m
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:56
5:56
5:56
5:54
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:50
6:50
6:50
6:51
Temp °C
22
23
25
25
25
23
23
22
22
23
25
26
26
23
23
22
22
24
26
26
25
24
23
23
21
21
24
23
24
22
23
22
21
22
25
26
26
22
23
22
21
23
25
26
25
24
23
23
Swell 1
Height (m)
Direction
Period (s)
0.4
NW
13
0.4
NW
13
0.4
NW
12
0.4
NW
14
0.4
NW
14
0.4
NW
13
0.4
NW
13
0.4
NW
13
0.4
NW
12
0.4
NNW
12
0.4
NNW
12
0.4
NNW
12
0.4
NNW
11
0.4
NW
11
0.4
NNW
13
0.4
NNW
13
0.4
NNW
13
0.4
NNW
12
0.4
NNW
12
0.4
SSW
15
0.5
SE
6
0.4
NNW
11
0.4
NW
11
0.5
NW
16
Energy kJ
43
42
40
50
49
46
44
41
39
57
56
54
51
33
66
67
65
60
56
76
21
51
32
133
Swell 2
Height (m)
Direction
Period (s)
0.4
SW
12
0.3
SW
12
0.3
SW
12
0.2
SSW
12
0.2
SSW
11
0.3
SE
6
0.4
SE
6
0.3
SE
6
0.3
SE
6
0.2
ESE
5
0.4
SE
6
0.3
SSW
16
0.4
SSW
16
0.3
SSW
16
0.3
SSW
16
0.4
SE
6
0.4
S
15
0.4
SSW
15
0.4
SSW
15
0.4
NNW
12
0.4
SSW
16
0.4
SSW
16
0.3
SSW
16
0.4
SSW
16
Energy kJ
36
22
22
13
12
5
8
6
5
3
8
51
86
51
51
9
68
72
73
56
85
86
50
84
Swell 3
Height (m)
Direction
Period (s)
0.3
SE
6
0.2
NNE
6
0.2
N
5
0.2
S
13
0.1
S
13
0.2
SSW
11
0.2
S
18
0.2
S
18
0.2
SSW
13
0.2
SSW
12
0.3
S
16
0.4
SE
6
0.3
SE
5
0.3
SE
5
0.2
SSW
12
0.3
S
15
0.4
SE
6
0.3
NNE
8
0.3
NNE
8
0.4
SE
6
0.4
NNW
12
0.3
NNE
8
0.3
NW
17
0.4
NW
11
Energy kJ
5
4
2
14
3
12
25
25
16
15
46
8
4
3
14
39
9
13
11
10
54
12
44
31
Wind waves
Height (m)
Direction
Period (s)
1.1
E
7
0.9
E
7
0.3
NNE
5
0.5
NNE
3
0.4
NNE
4
0.4
NE
3
0.2
NNE
4
0.2
ENE
2
1.4
E
6
1.4
E
6
1.2
E
6
1.2
E
6
0.4
SE
6
1.4
E
6
1.3
E
6
1.2
E
6
1.3
E
6
2
E
6
1.9
E
6
1.3
E
6
1
E
6
1.3
E
8
Energy kJ
126
80
5
5
5
2
2
1
125
127
88
89
9
125
108
89
108
305
291
124
60
191
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
15
17
17
15
17
13
13
17
17
15
4
4
4
12
12
4
12
12
13
12
12
12
12
12
Best forecast wave conditions in Maui
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
1
1
2
2
2
Best forecast wave conditions in United States
Rating
(10 max)
1
2
2
1
2
2
2
3
3
2
2
2
2
2
2
3
4
2
2
3
3
3
3
3
Header Global
Rating
(10 max)
8
7
6
5
5
5
5
4
5
6
6
6
7
5
5
5
5
5
9
5
7
5
5
4
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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