Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Mundial 2026 Grupos) Pick polygram.ink (preferred broker) |
91% | 9% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
91% | 9% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 31°C | 91% |
| 32°C | 9% |
| 26°C or below | 0% |
| 27°C | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 33°C | 0% |
| 34°C | 0% |
| 35°C | 0% |
| 36°C or higher | 0% |
Market context
Hong Kong's weather on 18 August 2026 will be measured against the Hong Kong Observatory's official daily maximum temperature record, with settlement determined by which temperature band captures the highest reading recorded that day in degrees Celsius to one decimal place.
August represents the peak of Hong Kong's summer monsoon season, when daily maxima typically range between 31–34°C. Historical data from the Observatory shows that mid-August temperatures rarely exceed 35°C in the territory, though heat waves can push readings toward 36–37°C during particularly intense pressure systems. The 0% crowd probability suggests traders are pricing in an expectation that the highest temperature will fall within a specific lower band, likely reflecting seasonal norms rather than exceptional heat conditions. Comparable August dates over the past decade provide the most reliable baseline: the Observatory's climate records indicate that extreme heat events (38°C or above) occur infrequently in August, making such outcomes statistical outliers rather than standard outcomes.
Traders monitoring this market should track tropical cyclone activity and upper-air pressure patterns in late July and early August 2026, as these systems directly influence whether monsoon conditions persist or whether a high-pressure ridge establishes itself over southern China. The Observatory publishes extended forecasts roughly ten days in advance; any shift toward anomalously high pressure or suppressed convection would signal potential for above-average temperatures. Settlement depends entirely on the Observatory's publication of the "Absolute Daily Max" figure in their Daily Extract database, which typically becomes available within 48 hours of the observation date.
Methodology
Football-specific comparison page for Pronóstico: Highest temperature in Hong Kong on August 18?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi (US-focused) or Manifold (play-money).
Resolution & payout
Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.
FAQ
- Are prediction markets better than sports betting?
- Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.
- When do sports markets resolve?
- Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.
- What are live sports odds on Polymarket?
- Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.
- How fast do sports winnings settle?
- Once the official league outcome is logged in the UMA Oracle (typically 1-2 hours after the final whistle), Polymarket's smart contract triggers USDC payout. To your wallet within minutes.
- What's the difference between match odds and outright odds?
- Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.
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