Grandma's surf break

Grandma's surfForecast / HAW – Maui / USA

information circle48hr Weather and Surf, issued 1 pm Monday 11 May 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
25.5° C
(Which is slightly warmer than usual)

How big are the waves at Grandma's today?

The current surf forecast for Grandma's at 5PM is: 0.4m 17s primary swell from a South-southwest direction (forecast issued at 01:00pm May 11). An open ocean swell of 0.4m 11s is not directed at the surf break, a second open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be offshore.

Time (HST) & DateWave HeightWave Period
Morning (11 May)1ft (0.3m)18s
Afternoon (11 May)1ft (0.3m)18s
Evening (11 May)1.5ft (0.4m)17s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Some drizzle, heaviest during Wed afternoon. Warm (max 27°C on Mon afternoon, min 22°C on Mon night). Wind will be generally light.

Mon
11
Tuesday
12
Wednesday
13
Thu
14
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
5 AM
8 AM
Rating
(10 max)
0
1
1
1
1
1
1
1
1
1
1
0
1
0
0
1
1
0
0
0
0
0
0
0
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.3
SSW
18
0.3
SSW
18
0.4
SSW
17
0.4
SSW
17
0.3
SSW
17
0.3
SSW
17
0.4
SSW
16
0.4
SSW
16
0.4
SSW
16
0.5
S
16
0.4
SSW
16
0.3
S
16
0.3
S
15
0.3
SSW
15
0.3
SSW
14
0.4
S
14
0.4
S
14
1.7
E
6
0.3
SSW
14
0.3
S
13
0.2
SSW
15
0.3
SW
15
0.3
S
13
0.3
S
13
Wave Graph
Metric surfscale
Energy kJ
61
60
101
101
58
54
86
84
84
129
82
42
38
42
41
66
65
0
37
31
21
33
30
30
Wind (km/h)
20
NNE
10
NNE
20
NE
20
NNE
20
NE
15
NNE
15
NE
15
NE
5
NNE
5
NE
15
NE
15
NE
15
NE
15
NE
10
NNE
5
NNE
5
SSW
15
ENE
15
NE
10
NE
15
NE
10
NNE
10
NNE
10
NNE
cross-off
off
off
off
off
cross-off
off
off
cross-off
off
off
off
off
off
cross-off
cross-off
glassy
cross-off
off
off
off
off
off
cross-off
High Tide
12:43PM0.45m
00:14AM0.49m
1:25PM0.55m
1:00AM0.44m
2:07PM0.64m
1:46AM0.39m
Low Tide
6:02PM0.15m
6:29AM-0.03m
7:12PM0.13m
7:01AM-0.06m
8:16PM0.10m
7:34AM-0.09m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
clear
part cloud
cloud
rain showers
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:50
5:48
5:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:53
6:54
6:54
6:55
1
Temp °C
26
27
26
24
23
22
22
24
26
26
26
24
23
23
23
24
25
25
25
24
23
23
23
24
24
27
24
23
22
22
21
23
27
27
26
24
23
23
24
25
27
25
24
25
23
24
24
25
Swell 1
Height (m)
Direction
Period (s)
0.5
NNW
12
0.6
NNW
11
0.4
NW
11
0.4
NW
11
0.4
NW
11
0.4
NNE
7
0.4
SSW
16
0.4
SSW
16
0.4
SSW
16
0.5
S
16
0.4
SSW
16
0.4
NNW
10
0.5
SE
7
0.4
ESE
6
0.4
NNW
10
0.4
S
14
0.4
NNW
10
0.4
SE
6
0.3
SSW
14
0.4
SE
7
0.3
N
9
0.3
N
8
0.4
SE
5
0.4
NW
16
Energy kJ
78
95
30
30
29
17
86
84
84
129
82
40
23
16
32
66
31
10
37
14
14
11
7
68
Swell 2
Height (m)
Direction
Period (s)
0.3
SSW
18
0.3
SSW
18
0.4
SSW
17
0.4
SSW
17
0.3
SSW
17
0.4
NW
11
0.4
SE
6
0.3
N
7
0.3
N
7
0.3
NNE
6
0.4
NNW
10
0.3
S
16
0.4
NNW
10
0.4
NNW
10
0.4
SE
6
0.4
SE
6
0.4
S
14
0.3
NNE
6
0.2
ESE
7
0.3
N
9
0.2
SSW
15
0.3
SW
15
0.3
NNE
8
0.3
S
13
Energy kJ
61
60
101
101
58
29
10
8
8
8
42
42
33
33
10
10
65
6
5
15
21
33
14
30
Swell 3
Height (m)
Direction
Period (s)
0.2
S
12
0.2
ESE
6
0.3
SE
6
0.4
SE
6
0.4
SE
6
0.3
SSW
17
0.3
N
7
0.3
NW
11
0.3
NNW
12
0.3
NNW
11
0.3
N
6
0.3
NNE
6
0.3
S
15
0.3
SSW
15
0.3
SSW
14
0.4
NW
10
0.4
SE
6
0.2
NNW
9
0.2
NNW
9
0.3
S
13
0.2
S
13
0.2
NNW
17
0.3
S
13
0.3
NNE
8
Energy kJ
11
4
6
10
10
54
8
18
26
23
7
7
38
42
41
24
10
8
8
31
14
29
30
14
Wind waves
Height (m)
Direction
Period (s)
1.3
E
6
1.6
E
6
0.4
NNE
3
0.4
NE
3
0.2
ENE
2
1.5
E
6
1.3
E
6
1.1
E
6
1.5
E
6
1.3
E
6
0.4
ESE
7
1.8
E
6
1.6
E
6
1.6
E
6
1.4
E
6
1.4
E
6
1.7
E
6
0.4
NNE
6
0.3
NNE
3
0.5
E
7
0.5
E
6
1.4
E
6
1.2
E
8
Energy kJ
100
157
3
2
1
149
108
75
148
130
19
272
196
188
144
148
211
13
2
24
20
125
177
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
12
4
12
12
12
12
12
12
4
4
4
12
12
12
12
12
15
188
12
12
12
12
4
12
Best forecast wave conditions in Maui
Rating
(10 max)
2
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
2
2
3
3
3
3
3
2
2
2
3
3
2
2
3
2
1
1
2
4
4
4
4
3
Header Global
Rating
(10 max)
9
9
9
5
8
8
9
9
9
9
6
9
9
7
7
6
9
8
9
5
5
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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