Wind Days = % of days with 12–35 knot average wind speed (ideal kiting conditions). Based on 6 years of historical weather data.
33%
Avg Wind Days
year-round
10.5kts
Avg Wind
year-round
18°
Avg Temp
feels 17°
6yrs
Data History
analyzed
Spot Overview
📍
River mouthSpot Type
IntermediateSkill Level
About This Spot
Tenryugawa is a river mouth estuary where the Tenryū River meets the Pacific Ocean along Japan's southern Shizuoka coast. The spot is characterized by a narrow discharge channel flanked by developed industrial and agricultural areas, with visible sediment patterns indicating active river dynamics. The lagoon-like system shows clear tidal influence with sand bar formations and color gradients typical of freshwater-saltwater mixing zones. Wind reliability is relatively low at 33.2%, with average winds around 10.5 knots. Wave heights average 1.26m, making conditions moderate. The spot requires understanding of tidal currents and river outflow patterns, as seaward-flowing freshwater creates distinct navigational challenges. Best conditions occur with northerly winds that provide side-shore approach. The narrow channel and proximity to industrial infrastructure limit space and demand intermediate-level local knowledge. Kiters should monitor tide tables and be prepared for variable current conditions influenced by seasonal river flow variations.
Hazards & Safety
Strong river current flowing seaward
Shallow sandbar formations visible in estuary
Tidal influence and changing water levels
Industrial structures and development nearby
Potential debris from river outflow
Narrow channel between jetties limiting space
Live Wind Forecast
Real-time wind conditions and 10-day forecast powered by ECMWF
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Wind speeds shown in knots (kt). Tap expand for full-screen view. Forecast updates every 6 hours from European weather model.
Water Conditions
Historical ocean data for wetsuit planning & water type
21°C
Avg Water Temp
1.3m
Avg Waves
🏄 Waves
Typical Conditions
🧥 4/3mm Fullsuit
Typical Wetsuit
Proper waves for wave riding
Wind Characteristics
NWDominant Direction
GustyVariable wind, best for experienced riders
Best Time to Kite
Wind reliability by time of day (average across all months)
Morning
6am – 12pm
34%wind days
Best
Afternoon
12pm – 6pm
46%wind days
Evening
6pm – 9pm
38%wind days
Best Months for Wind
Months with 50%+ wind days (12–35 knots)
January61%wind daysBest: Afternoon18°C water
February58%wind daysBest: Afternoon16°C water
December56%wind daysBest: Afternoon18°C water
Monthly Breakdown
Historical averages based on 6 years of data
Month
Wind Days
Avg Wind
Temp
Water
Best Time
Rain
Jan
61%
14kts
8°feels 3°
18°
PM
~5d
Feb
58%
13kts
9°feels 3°
16°
PM
~6d
Mar
42%
12kts
12°feels 8°
Monthly Water Conditions
Plan your wetsuit and know what to expect in the water