Persistent cloud cover forecasts from the Icelandic Meteorological Office are the dominant driver behind the 92.5% market-implied odds against high visibility of the August 12, 2026 total solar eclipse in Reykjavík. Models indicate overcast skies with rain and minimal breaks across the capital region and Reykjanes Peninsula during the late-afternoon totality window, consistent with August climatology showing 70-80% average cloud cover. This aligns with satellite observations and short-range guidance projecting little opportunity for clear views of the Sun’s corona or diamond-ring effect. Trader conviction reflects the proximity to eclipse day and the stability of these predictions. A sudden model shift toward localized clearing or unexpected coastal gaps could still allow partial visibility of key phases, though current consensus views this as unlikely.