Grandma's surf break

Grandma's surfForecast / HAW – Maui / USA

information circle48hr Weather and Surf, issued 7 am Thursday 30 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
25.3° C
(Which is slightly warmer than usual)

How big are the waves at Grandma's today?

The current surf forecast for Grandma's at 3PM is: 0.4m 16s primary swell from a South-southwest direction (forecast issued at 07:00am April 30). An open ocean swell of 0.4m 12s is not directed at the surf break, a second open ocean swell of 1.3m 6s is not directed at the surf break. The wind direction is predicted to be offshore.

Time (HST) & DateWave HeightWave Period
Morning (30 Apr)0.5ft (0.2m)12s
Afternoon (30 Apr)1.5ft (0.4m)16s
Evening (30 Apr)1ft (0.3m)16s

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 Thu night). Wind will be generally light.

Thursday
30
Friday
1
Saturday
2
Sun
3
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
1
1
1
1
0
1
1
1
1
1
1
1
1
1
1
2
2
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)
0.3
SE
6
0.2
SSW
12
0.3
S
16
0.4
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
0.5
NW
17
0.6
S
14
0.6
NW
15
0.6
NW
15
0.4
SSW
14
0.5
NW
14
0.6
S
16
0.5
S
14
Wave Graph
Metric surfscale
Energy kJ
5
15
46
86
86
51
51
39
68
72
73
76
85
86
50
133
142
150
183
174
70
96
177
93
Wind (km/h)
20
NNE
20
NE
15
NE
10
ENE
15
NE
15
NE
15
NNE
15
NNE
20
NE
15
NE
10
NE
10
NE
15
ENE
15
NNE
15
NNE
15
NNE
10
NE
15
NNE
5
NNE
10
NNE
10
NE
15
NNE
15
NNE
15
NNE
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
cross-off
off
off
cross-off
off
off
off
off
off
High Tide
2:53AM0.38m
3:44PM0.67m
3:29AM0.34m
4:20PM0.70m
4:05AM0.30m
4:57PM0.70m
Low Tide
8:32AM-0.04m
10:09PM0.10m
9:00AM-0.04m
10:55PM0.10m
9:31AM-0.04m
11:41PM0.10m
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:56
5:56
5:54
5:54
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:50
6:50
6:51
6:51
Temp °C
22
24
25
26
25
23
23
22
22
24
26
26
25
24
23
22
22
24
25
25
25
23
23
22
21
23
24
26
23
22
23
21
21
23
26
26
25
24
23
22
22
24
26
26
26
23
23
22
Swell 1
Height (m)
Direction
Period (s)
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
0.6
N
13
0.4
NNW
12
0.4
NNW
12
0.4
SSW
15
0.4
SSW
16
0.4
NNW
11
0.4
NNW
11
0.5
NW
16
0.5
NW
17
0.6
S
14
0.6
NW
15
0.6
NW
15
0.6
NNW
14
0.5
NW
14
0.6
S
16
0.5
NW
13
Energy kJ
39
57
56
54
51
33
66
67
121
60
56
76
85
51
48
133
142
150
183
174
136
96
177
85
Swell 2
Height (m)
Direction
Period (s)
0.3
SE
6
0.3
SE
5
0.3
SE
6
0.4
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
NNW
12
0.4
SSW
16
0.3
SSW
16
0.4
SSW
16
0.4
SSW
14
0.5
NW
15
0.5
S
14
0.5
S
14
0.4
SSW
14
0.4
SSW
14
0.5
NW
13
0.5
S
14
Energy kJ
5
4
5
86
86
51
51
8
68
72
73
56
54
86
50
84
63
115
106
107
70
70
88
93
Swell 3
Height (m)
Direction
Period (s)
0.2
NNE
5
0.2
SSW
12
0.3
S
16
0.4
SE
6
0.3
SE
5
0.3
SE
5
0.3
SE
6
0.3
S
15
0.4
SE
6
0.3
NNE
8
0.3
NNE
8
0.4
SE
6
0.4
SE
6
0.3
NNE
7
0.3
NW
17
0.4
NW
11
0.4
NW
11
0.3
NNW
11
0.3
SSW
18
0.3
SSW
18
0.3
NNE
6
0.3
N
6
0.3
NNE
6
0.4
SSW
16
Energy kJ
2
15
46
8
4
5
5
39
8
13
12
8
11
10
44
31
32
24
61
61
8
7
7
86
Wind waves
Height (m)
Direction
Period (s)
0.9
E
6
1.4
E
6
1.4
E
6
1.2
E
6
1.2
E
6
1.3
E
6
1.2
E
6
1.5
E
6
1.5
E
6
1.5
E
6
1.2
E
6
1.2
E
6
1.1
E
8
0.9
E
5
0.9
E
5
0.9
E
5
1.4
E
8
0.9
E
5
1.6
E
8
1.1
E
6
1
E
5
Energy kJ
50
130
127
94
89
105
92
149
151
156
96
92
135
42
40
40
234
40
314
72
57
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)
17
15
4
12
13
12
12
12
12
12
4
4
12
12
12
4
4
4
4
4
4
12
4
4
Best forecast wave conditions in Maui
Rating
(10 max)
1
1
1
1
1
1
2
2
2
1
1
2
1
2
2
2
2
2
2
3
2
2
2
2
Best forecast wave conditions in United States
Rating
(10 max)
3
2
2
2
2
2
3
3
3
2
2
3
3
3
3
4
3
3
3
3
3
3
3
2
Header Global
Rating
(10 max)
5
6
6
6
7
7
5
6
5
5
5
9
7
5
5
4
4
4
4
4
4
5
5
5
  • 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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