Puerto Rico · Harmonic Tide Model
Tide Table SAN JUAN — 2026
📍 Lat 18.4589, Lon -66.1164
Tide range. Higher values mean spring tides.
The moon drives the tides and the fish.
Radar de Chuva (Tempo Real)
Temperatura da Água
Carregando...
Índice UV Atual
Carregando...
🏖️ Recommended Activities
At low tide the waters tend to be calmer.
Access only within the 2 hours near the lowest tide.
Ask the skipper about the conditions.
🎣 Solunar Table
Major Periods (2h)
Minor Periods (1h)
Based on the Solunar Theory (John Alden Knight): fish and wildlife tend to feed more during the periods when the moon is overhead or underfoot (major) and at moonrise/moonset (minor). The score considers the lunar phase and the crossing of major periods with the local high tide.
Nearby places
📘 About SAN JUAN Tide Forecast
Found at 18.46° N latitude and 66.12° W longitude, SAN JUAN serves as a prominent coastal location in Puerto Rico. Its tidal pattern is mixed semi-diurnal (unequal tidal heights across the day), with a mean tidal range of 0.4m and spring tides reaching up to 0.5m. The minimal tidal range protects anchorages from extreme water level changes, facilitating port operations. Mixed tides make planning more complex: the day's two high tides reach different heights, requiring careful study of the tide table before each outing. Waters along this coast are influenced by events such as El Niño, which can temporarily raise mean sea level. Access the updated 2026 tide table for SAN JUAN featuring exact high and low water times, ranges, and coefficients for boating and angling. In September, SAN JUAN is in its autumn season, a key period for water sports, fishing, diving, and coastal navigation. All tide predictions are computed from harmonic constants validated for this coastal station, with accuracy within ±15 minutes for most conditions.
⚠️ Notice
Astronomical prediction from a harmonic model — does not account for storm surge, meteorological tide, or extreme events.