**Marine layer moderation and onshore flow are keeping coastal Los Angeles highs well below inland values despite the regional heat dome.** Official NWS forecasts for Los Angeles County beaches and coastal zones project mostly cloudy conditions on August 27 with highs in the lower-to-mid 80s, contrasting sharply with 94–101°F ranges farther inland and downtown peaks near 100°F. Persistent southwest winds and low cloud cover overnight into morning limit daytime heating, while the broader heat wave (driven by a strong upper-level high over the Southwest) has produced consecutive 90°F+ days but spares the immediate coast due to the Pacific marine influence. **Model consensus and recent trends support this coastal cooling.** Updated NWS guidance shows little change from prior runs, with the heat warning extending through Friday but emphasizing greater cloudiness and onshore flow on the 27th that caps temperatures. Historical August averages near 77°F highlight how unusual the current setup is, yet traders price the marine layer’s damping effect as dominant for the official Los Angeles reading (typically reflecting coastal or LAX-area observations). Key near-term variables include any strengthening of the onshore breeze or unexpected clearing, which could nudge the high a degree or two higher within the tightly clustered 84–87°F band.