Portugal · Harmonic Tide Model
Tide Table Sines — 2026
📍 Lat 37.9490, Lon -8.8880
Tide range. Higher values mean spring tides.
The moon drives the tides and the fish.
Radar de Chuva (Tempo Real)
Temperatura da Água
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Índice UV Atual
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🏖️ 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 Sines Tide Forecast
The coordinates for Sines (37.95° N, 8.89° W) place this stretch of Portugal's coast in the northern hemisphere. Its tidal pattern is semi-diurnal (two high and two low tides per day), with a mean tidal range of 1.6m and spring tides reaching up to 2.5m. Mid-range tides like these are popular with surfers seeking waves that shift in shape and height across the tidal cycle. The semi-diurnal pattern, with two complete cycles every 24 hours, allows nautical activities to be planned in virtually any shift of the day. Intense weather events such as storms can create temporary storm surges that add to the astronomical high tide. Check the official 2026 tide forecast for Sines here, including detailed monthly schedules, peak times, and daily metric swings. In September, Sines is in its autumn season, a key period for water sports, fishing, diving, and coastal navigation. Our oceanographic database syncs historical gauge records to refine harmonic coefficients for this stretch of coastline.
⚠️ Notice
Astronomical prediction from a harmonic model — does not account for storm surge, meteorological tide, or extreme events.