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Surf Forecasts:

Grandma's surf break

Grandma's surfForecast / HAW – Maui / USA

information circle48hr Weather and Surf, issued 7 pm Saturday 17 Jan 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 10PM is: 0.4m 13s primary swell from a Northwest direction (forecast issued at 07:00pm January 17). An open ocean swell of 0.8m 12s is not directed at the surf break, a second open ocean swell of 0.4m 6s is not directed at the surf break. The wind direction is predicted to be offshore.

Time (HST) & DateWave HeightWave Period
Morning (17 Jan)--
Afternoon (17 Jan)1.5ft (0.4m)14s
Evening (17 Jan)1.5ft (0.4m)13s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table
Saturday
17
Sunday
18
Monday
19
Tuesday
20
5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 PM
Rating
(10 max)
0
0
0
0
1
1
2
1
3
3
2
2
2
2
1
1
1
1
1
1
1
1
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.4
NW
0.4
NW
0.4
NW
0.4
NW
0.4
NW
0.3
NW
0.8
NW
1
NW
1.1
NW
1.1
NW
1.1
NW
1
NW
0.9
NW
0.9
NW
0.8
NW
0.7
NW
0.6
NW
0.6
NW
0.6
NW
0.4
NW
0.4
NW
0.3
NW
0.4
NW
0.4
NW
Period(s) (?)131313131320191817161615141414141313131312181616
Wave
Graph
(?)Metric surfscale
Energy kJ (?)4644444444614186007286446364413503462451891401091085653539591
Wind
(km/h)
15
NNE
20
NE
15
NE
15
NE
10
ENE
5
ENE
5
WSW
5
SW
5
WSW
5
E
0
E
5
NNE
5
NNE
5
E
5
WSW
5
SSW
5
WNW
5
W
5
SSW
5
SSE
10
ENE
5
NNE
5
SW
10
NW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offoffoffoffcross-
off		cross-
off		glassonglassglassglassglassglassglassglassglassglassglassglassglassoffglassoncross
High Tide
/ height (m)
3:33PM
0.27
4:10AM
0.79
4:12PM
0.28
4:43AM
0.77
4:53PM
0.30
5:14AM
0.74
Low Tide
/ height (m)
8:40PM
-0.04
11:04AM
0.06
9:20PM
-0.03
11:32AM
0.05
10:01PM
-0.01
11:59AM
0.03
Saturday
17
Sunday
18
Monday
19
Tuesday
20
Sunrise-----7:05-------7:05-------7:05--
Sunset6:07-------6:07-------6:07-------
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
clear
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
Rain (mm)
------------------------
Temp. °C232121202020232424232221212124242423232322222425
Feels °C (?)201819181920232424242321222125252524242422232424
  • 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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FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Grandma's surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Grandma's at:
surf-forecast.com

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