Nagahama surfForecast / Kanagawa / Japan

information circle12 Day Weather and Surf, issued 8 am Thursday 18 Dec 2025 JST
Forecast update in hr  min  s Forecast update imminent
Nagahama surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Nagahama sea temperature is
18.0° C
(Which is 1.2°C colder than average for this time of year)


Best Forecast Surf Conditions for Nagahama this week:

The most powerful waves expected at Nagahama in the next 12 days are 3.0m 8s and forecast to arrive on Thursday (Dec 25) at 9AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Monday (Dec 22) at 9AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 9AM (Thu 25th Dec)10ft (3.0m) 8s

Table - best surf conditions forecast for Nagahama over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Moderate rain (total 16mm), heaviest on Sat night. Very mild (max 18°C on Sat night, min 8°C on Fri morning). Winds increasing (calm on Fri afternoon, fresh winds from the SSW by Sat night).

Days 3-6 Weather Summary Moderate rain (total 12mm), heaviest on Sun afternoon. Very mild (max 18°C on Sun afternoon, min 7°C on Mon night). Winds decreasing (strong winds from the NNE on Sun night, light winds from the NE by Tue afternoon).

Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.3
SSW
0.2
SSW
0.1
SW
0.1
SE
0.1
SE
0.6
SE
0.8
SSE
1.1
S
1.4
S
1.6
S
2
S
1.2
S
0.8
SSE
0.6
SSE
0.5
SE
0.4
SE
0.4
SE
0.4
SE
0.4
SE
0.7
SE
1.1
S
Period(s) (?)66611115556678788999885
Wave
Graph
(?)Metric surfscale
Energy kJ (?)84255193364153196382163714435292819186960
Wind
(km/h)
25
NE
20
NE
15
NNE
20
NNE
5
NE
5
WSW
25
SSW
20
SW
35
SW
40
SSW
25
SW
20
NNE
40
NE
25
NE
25
NE
25
NNE
10
NE
10
NNE
5
N
10
SW
20
SW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offoffoffcross-
off
glassononononononcross-
off
offoffoffoffoffcross-
off
cross-
off
onon
High Tide
/ height (m)
2:44PM
1.42
5:07AM
1.38
3:22PM
1.46
5:48AM
1.41
4:00PM
1.49
6:26AM
1.42
4:39PM
1.49
7:03AM
1.40
5:19PM
1.47
7:39AM
1.38
6:00PM
1.43
8:14AM
1.35
6:46PM
1.36
Low Tide
/ height (m)
9:24AM
0.92
9:58PM
0.05
10:07AM
0.94
10:37PM
-0.02
10:46AM
0.95
11:16PM
-0.06
11:24AM
0.94
11:54PM
-0.05
12:03PM
0.93
12:32AM
-0.01
12:43PM
0.91
1:10AM
0.08
1:27PM
0.87
1:49AM
0.19
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Sunrise6:43--6:43--6:45--6:45--6:46--6:46--6:47--
Sunset-4:30--4:30--4:31--4:31--4:32--4:32--4:34-
part cloud
part cloud
clear
clear
clear
light rain
light rain
rain showers
mod rain
mod rain
rain showers
part cloud
part cloud
part cloud
clear
part cloud
clear
part cloud
part cloud
cloud
mod rain
Rain (mm)
-----1231066---------7
Temp. °C10121110121617161817181810101081010101617
Feels °C (?)3776101212131312151714326671112
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Nagahama Surf forecast

The above surf forecast table for Nagahama provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Nagahama can be found by selecting the local surf guide option on the grey menu. Our Nagahama surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Nagahama) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Nagahama may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Nagahama is 6 km (4 miles) from Miura. If you plan a holiday in Kanagawa, look for hotels and other accommodation in Miura. Miura has rooms for a wide range of budgets as well as car hire and transport links.

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