Predictions: Open-Meteo Marine (MeteoFrance SMOC, 0.08° grid) — heights relative to MSL (not chart datum / LAT). Model-derived.

Model-derived from a global ocean grid. Useful indication; expect about ±45 minutes on average vs. a local harmonic gauge, individual stations vary widely. See /methodology for per-region detail. Not for navigation.

Conditions as of 18:00 local time. Refreshes daily.

Predictions: Open-Meteo Marine (MeteoFrance SMOC, 0.08° grid) — heights relative to MSL (not chart datum / LAT). Model-derived. · Not for navigation.

The angler tradition that rates each day for fish-bite likelihood using moon transits and rise/set. One to five stars, not a scientific forecast.

• Mon
  ★★★★★
• Tue
  ★★★★★
• Wed
  ★★★★★
• Thu
  ★★★★★
• Fri
  ★★★★★
• Sat
  ★★★★★
• Sun
  ★★★★★

Next spring tide on Sun 03 May (range 0.3m). Next neap on Fri 01 May.

Spring tides cluster around new and full moons (biggest swings). Neap tides land on quarter moons (smallest swings). See the spring tide and neap tide glossary entries for the why.

Cagliari sits on the southern shore of Sardinia at the head of the Golfo di Cagliari, the working capital of the second-largest Mediterranean island and the historical Phoenician-then-Roman-then-Pisan-then-Aragonese port that anchored the western Mediterranean trade routes for nearly three thousand years. The city wraps the Castello quarter on a limestone bluff above the modern port, with the long Poetto beach corridor running east toward the Devil's Saddle (Sella del Diavolo) headland and the Stagno di Cagliari salt-marsh and lagoon system stretching north-east of the city across the coastal plain. The tide here is the small Tyrrhenian Mediterranean signal that the rest of mainland Italy shares: mean range at the Cagliari harbour gauge is about 0.2 metres, with spring tides reaching close to 0.3 metres and neaps dropping near flat. The astronomical signal is genuinely tiny because the Mediterranean connects to the Atlantic only through the narrow Strait of Gibraltar. What matters more on a day-to-day basis is meteorological tide. The mistral funnels down from the Gulf of Lion across the Sardinian Sea in cold-front events, dropping water level on the western coast and raising it on the eastern by 20 to 30 centimetres on sustained event days; the scirocco southerly that builds ahead of approaching depressions does the opposite and can raise water at Cagliari by 20 to 40 centimetres on sustained events. The defining ecological feature of the southern coast is the Stagno di Cagliari salt-marsh and lagoon system. The Molentargius-Saline regional park immediately east of the city wraps a chain of brackish lagoons, salt pans (saline), and reedbeds that hosts one of the largest greater flamingo breeding colonies in the western Mediterranean — about 10,000 to 20,000 pairs nest each spring, and the pink flocks visible from the Poetto beach promenade are a Cagliari signature. The salt-pan industry that gave the lagoons their working name was active from Roman times until the 1985 closure, and the modern lagoon system runs as a freshwater-fed brackish wetland with controlled exchange to the sea through engineered sluices. The Marina Piccola anchorage at the Devil's Saddle headland, the working ferry terminal at Molo Sant'Agostino with daily sailings to Civitavecchia, Genoa, and Palermo, the cruise calls at the modern Porto Canale, the surf at Chia and Capo Spartivento on the south-western coast, and the rocky shore at Cala Mosca and Calamosca all read the wider weather pattern more than the tide table. ISPRA Mareografico Nazionale runs the authoritative Italian gauge network; Open-Meteo Marine drives the gridded predictions on this page.