Homer, AK tide times

Homer occupies the south shore of the Kenai Peninsula where it meets the head of Kachemak Bay, a deep fjord cutting east off the lower Cook Inlet. Cook Inlet is one of the most tide-dominated waterways in North America, and Kachemak Bay is its south-side arm. Tides at Homer (NOAA Station 9455920) are semidiurnal with pronounced diurnal inequality and a mean range of approximately 5.4 m MLLW — the largest in this batch and among the largest regularly experienced by recreational users anywhere on the US coast. On maximum spring tides the range can reach 7.3 m. The predicted higher high water on a typical day sits near 6.0–6.5 m MLLW; the lower low drops to 0.1–0.2 m MLLW. A +0.9 m tide is a high tide by Long Island Sound standards; at Homer it exposes more than 3 km of intertidal flat across the bay.

Homer Spit is a 7 km gravel bar projecting southeast into Kachemak Bay — the longest natural gravel spit in Alaska accessible by road. At mean higher high water (approximately 6.1 m MLLW), saltwater reaches to within 5–10 m of the road on the spit's south side. At mean lower low water (0.2 m MLLW), the exposed tidal flat on the north (bay) side of the spit extends up to 300 m offshore and connects to the larger tidal flat system that covers 22 km² across Kachemak Bay at low water. The Spit is home to the Small Boat Harbor, the primary launch point for halibut charter boats. Halibut boats typically depart 1 hour before low water — the strongest tidal currents in Kachemak Bay run 2–3 knots on the ebb near the spit tip, and halibut hold on the bottom in these current-swept areas. The timing of peak low water at Homer varies by up to 2 hours depending on whether it falls on a spring or neap cycle.

Across the bay from Homer Spit, the south shore of Kachemak Bay (accessible by water taxi from the Spit, roughly 10 minutes) exposes extensive intertidal clam beds at low tide. Pacific razor clams and steamer clams concentrate in the gravel-sand mix at 0.3–0.9 m MLLW. The window for productive clamming runs from approximately 2.5 hours before the predicted lower low to 1.5 hours after — roughly a 4-hour window centered on the low. Experienced diggers time the run to a predicted low below 0.4 m MLLW; anything above 0.5 m MLLW cuts the productive flat significantly. The tidal flat across Kachemak Bay also hosts harbor seals hauled out on sand bars from 4 hours before the low through the early flood, and beluga whales from Cook Inlet occasionally enter the bay on high spring tides chasing eulachon and salmon.

Halibut charter fishing is Homer's primary commercial draw, with approximately 60–80 charter boats operating out of the Small Boat Harbor from May through September. Most halibut charters work the 20–40 fathom ledge system on the outer bay, where bottom current driven by the tidal cycle keeps bait moving. The incoming tide (flood) is generally considered better fishing for halibut in Kachemak Bay; charter captains target the first half of the flood, roughly 1.5–3.5 hours after the predicted low water. Kayakers crossing from Homer Spit to the south shore state park must contend with tidal currents near the spit tip — up to 2.5 knots on spring tides — and plan the crossing around slack water, which occurs approximately 30 minutes after the predicted high or low at the Homer gauge. Landscape photographers using the low tidal flats for foreground reflection work have the most reliable conditions at lower-low tides below 0.3 m MLLW on clear mornings, when the flat holds shallow pools reflecting the Kenai Mountains across the bay.

TideTurtle tide predictions for Homer are generated from Open-Meteo Marine, a free gridded global ocean model. Accuracy is typically ±45 minutes on timing and ±0.2–0.3 m on height compared to observed tides. At Homer, where the range reaches 7 m on spring tides, a 0.3 m height error translates to a significant difference in how far the tide reaches on the flat — plan conservatively. NOAA CO-OPS is the authoritative source for Homer tide data; the primary gauge is Homer, AK (Station 9455920) at tidesandcurrents.noaa.gov. Use NOAA CO-OPS for halibut charter scheduling, clam-flat timing, and any safety-critical planning.